It seems as though the suggestions Forums are at a lull these days (for good reason). Maybe this will help spark it again.
The Wraith BuilderShe came from the Abyss where dwelt Lucidious and Sypherious in ages past. She was said to have served the Titans in the elder days. All fear her, but the wise Magnataur have said that she is worthy of trust. She wishes to dissolve the binds to her old masters. At last she will have revenge…The Wraith Builder is a hard baser/support, though her supporting moves (similar to Faerie) are best for her actual base. Many of the Wraith spells consume Void Shards, which are items she can obtain from her Food Sources.
Builder 
Icon:

Health: 300
Mana: 150
Attack: The Wraith Builder cannot attack
Armour: 0 (unarmoured)
Speed: normal
Lumber Harvest Rate: Nature style harvesting (10/second)
Inventory: 6 slots
1x1 space
Golds as normal
Has and Orc/Undead build style (enters building for a second, then pops out and the building finishes itself)
Abilities: Ethereal Being
The Wraith comes from a realm far different than that of the other Builders. The void that embodies her, therefore, can only be harmed by highly potent energies. This is a passive ability which makes the Wraith Builder Ethereal. She cannot be attacked by normal strikes, but takes 66% more damage from magic. This is the Wraith’s starting ability and counts as her escape.
Incorporealize
The Wraith enters the Void Realm, allowing her to seemingly pass through solid objects. Incorporealize works exactly like a normal Wind Walk, except that it improves movement speed by 25% and lasts for 10 seconds. Lasts for 10 seconds and costs 50 mana. 90 second cooldown.
Embody
The Wraith links her spectral soul with that of a living being, shielding herself, but binding herself to her host while the spell lasts. The Wraith “possesses” an allied unit or creep. She does not gain control of the unit she Embodies: they are merely to shield her from enemy magic. If the unit she is embodying dies, she dies too. She cannot embody other builders. The Wraith can choose when to leave her host, but may not stay for more than 30 seconds or for less than 5. Note: Though a buff does appear on their status screen, there is no on-screen indication of a unit being Embodied. Costs 75 mana and has a 240 second cooldown which starts when the Wraith exits her host.
Numb
The target is deeply shaken by the bizarre energy of the Void. This unnatural sensation will cause them to botch many basic strikes. The targeted enemy gains a 30% chance to miss for 8 seconds. Costs 25 mana. 45 second cooldown.
Imp Horde
A group of irritating Imps flies out from the Wraith, conjured from their jail in the Void. They will vent their eternity of torture on whoever approaches them. The Wraith send out 5 Imps (which look like the little Shadow Strike guys), which circle her like the Locusts in the Crypt Lord’s Locust Swarm. Whenever an Imp hits an enemy unit, it drains 15 mana, which is then transferred to the Wraith. Lasts for 15 seconds. Costs 50 mana. 90 second cooldown.
Fear
The enemy is gripped with the icy chill of pure terror, preventing them from defending themselves as they cower from unknown horrors. That targeted enemy loses 5 armour and 50% movement speed for 8 seconds. Costs 45 mana. 120 second cooldown, 600 range.
Ensoul Crystal
The Wraith take one of her Shards of Void Crystal and imbues in with malevolent energy, causing it to fly about, launching bolts of destructive energy. Uses a Void Shard. Creates a fast, flying unit with a ranged (400), 25 Chaos damage attack and True Sight. The Ensouled Crystal lasts for only 10 seconds. 75 mana, 120 second cooldown.
Void Shell
The Wraith weaves a cloak of Void energy around the target, nullifying all magic directed towards it. The targeted ally gains spell immunity for 10 seconds. Can be used on the Wraith herself. 60 mana, 120 second cooldown.
Drain Soul
The Wraith, using the powers granted her by her old masters, siphons away an enemy’s soul, giving the replenishing energy to herself. This works exactly like Siphon Mana except that is drains 25 health per second and 10 mana per second (which is given to the Wraith). Range of 400, leash of 800. Costs 30 mana. 45 second cooldown.
Ritual of Insanity
The Wraith works the surrounding fabric of space and time into a furious maelstrom of energy, which sends everything nearby into a state of hyperspeed. Consumes 4 Void Shards. All nearby friendly units and buildings within 1000 gain +25% attack speed for 15 seconds. Costs 200 mana, has a 5 second casting delay, and has a 3 minute cooldown.
Ritual of Possession
Summoning her Void powers, the Wraith, for a brief period, controls the soul and body of her foe. Consumes 5 Void Shards. The Wraith Builder player gains control of the targeted enemy unit or critter for a certain amount of time, after which it is returned to its proper player. Titanious Minions are controlled by this spell for 10 seconds, Minion-Minions and normal critters are controlled for 60 seconds. Cannot be used on named critters or on the main Titan. May NOT target any allied unit. Costs 250 mana. Has a 6 second casting delay, 600 range, and a 3 minute cooldown.
Ritual of Resurrection
The Wraith returns from banishment to fight again… If the Wraith is killed with 6 Void Shards on her, 300 mana, and this spell recharged, she is brought back to life after 5 seconds, just like with an Ankh. All of the Shards are consumed and she returns to life with no mana. Her buildings and units do NOT disappear because she is not dead. Has a 5 minute cooldown.
Builds: Shelter
The halls of tortured souls provide plenty of material for the Wraith to work with. She can animate the skeletons of the dead to harvest raw materials for her as she waits. Icon:

Has all of the basic stats as a normal shelter. Does NOT research Lumber Harvesting Upgrades: the Wraith doesn’t use them.
Trains: Possessed Bones
The Wraith empowers a dead corpse with Void energy, allowing it to work for her, harvesting lumber for her grand schemes. This is the Wraith’s worker. It has the normal 50% Magic Resistance and these stats.
Food Cost: 40
Health: 50
Speed: normal
Harvest Rate: 10 per swing (10 cap)
Upgrades to: Imbued Bones 
(tinted or given a skin)
Has normal 50% Magic Resistance.
Food Cost: 60
Upgrade Cost/Time: 100 lumber/1 second
Health: 100
Harvest Rate: 10 per swing
Attack: 15 (Chaos)
Range: 250
Attack Speed: slow (Builder)
Speed: normal
Upgrades to: Ensouled Bones 
(tinted or given a skin)
Has normal 50% Magic Resistance.
Food Cost: 120
Upgrade Cost/Time: 500 lumber/10 seconds
Health: 300
Harvest Rate: 10 per swing
Attack: 25 (Chaos)
Range: 450
Attack Speed: Medium (around Succubus/Champion Harvester)
Speed: normal
Manacle Wall
Built from the spiked chains of penance, these terrifying structures incite the deep pain of torture in all nearby. Icon:

Has the same stats as a normal wall. Upgrades to an Enforced Manacle Wall, which has the same stats as a normal upgraded wall.
Ability: Spirits of the Tortured
The great chains and spikes which make up Manacle Walls have been used to destroy the souls of millions of victims over eons of time. The unresting spirits of these unfortunate beings still haunt the walls, even on the island. All Manacle Walls gain an ability which deals 5 damage/second to all those within 200 (stacking).
Void Crystal (Possibly a red-tinted gem of some kind, please give ideas)
Void Crystals provide the Wraith with enough energy to continue her operations on the island. In emergencies, Void Crystals can be shattered and their core taken to provide extra energy. Icon:

Void Crystals are the Wraith’s Food Sources. They have normal stats save for those listed.
Food Provided: 10
Health: 100
Armour: 0 (Fortified)
Base Size: 2x2
Attack: none
Ability: Shatter
Void Crystals are very fragile, and a quick burst of energy can shatter them, leaving only their powerful core behind. The Void Crystal loses 25 life per second, effectively detonating itself after 4. If a Void Crystal uses Shatter, it leaves behind a Void Shard. Shatter cannot be stopped once started.
Void Shard
The potent core of the Void Crystal can be saved when the Crystal itself is destroyed. Void Shards are items which can only be picked up by the Wraith Builder herself, but can be destroyed by any unit. They are required for her to perform several spells, and can be consumed, like a potion, to instantly heal 25 mana.
Haunted House (Research Center)
The Haunted House is where the Wraith resided for many years. It is where many of her ancient scrolls and artifacts are stored, and it is where she will learn how to vanquish her hated enemies, the Titans. The Haunted House has all of the normal stats for a Research Center and costs 300 Lumber.
Icon:

Sells
Turtle Scales Researches: Health Upgrades, as normal.
Bottled Soul
These preserved souls act almost like an energy drink, giving the Wraith new power. Permanently increases the Wraith’s mana by 50 per level. 3 levels. Costs the same as Ice Water.
Basic Void Sorcery
The Wraith studies ancient tomes and practices long-lost arts, increasing her magical repertoire.
Allows the Wraith to use the Numb ability. Costs 500 Lumber and takes 60 seconds to research.
Intermediate Void Sorcery
The Wraith continues her studies of ancient magical techniques, giving her summoning techniques never before seen on this world. Requires Basic Void Sorcery. Lets the Wraith use the Imp Horde ability. Costs 5 Gold, 100 Lumber, and takes 75 seconds.
Master Void Sorcery
The Wraith completes her practices of Void Sorcery, giving her power defensive magics to shield her and her allies. Requires an ARC and Intermediate Void Sorcery. Lets the Wraith use the Void Shell spell. Costs 15 Gold, 1000 Lumber, and takes 90 seconds.
Dark Crevasse
True power is hidden in the unknown. By harnessing this intense energy of fear, the Wraith can seriously weaken her enemies’ resolve and fighting capability. Allows the Wraith to use Fear and increases her speed by 10%. Costs 10 Gold, 500 Lumber, and takes 80 seconds.
Reality Anchor
By forming a magical Reality Anchor, the Wraith can safely traverse between the Void Realm and the island. Lets the Wraith use Incorporealize. Costs 15 Gold, 250 Lumber, and takes 120 seconds.
Summon Dead Soul(Train Titan Hunter)
The Wraith uses the Keys of Hades to unlock the doors of the underworld and retrieve a soul of the unworthy dead. This soul can be manipulated by the Wraith to do her bidding. Trains a Dead Soul, which can be upgraded into a Titan Hunter. A Dead Soul can be upgraded into one of these three Titan Hunters: a Burnt Soul, a Drowned Soul, or a Poisoned Soul. To upgrade a Dead Soul takes 10 seconds. After being upgraded, the new Soul (Burnt, Drowned, or Poisoned) becomes your true Titan Hunter and can be revived and upgraded as normal. To Summon a Dead Soul requires The First Key of Hades. The other two technologies (Second and Third Keys of Hades) allow the Wraith player to train up to two other Dead Souls, each of which may be upgraded into a previously unselected Titan Hunter. This way, eventually, the Wraith gains all three of her Titan Hunters.
Dead Soul
This Dead Soul was called from some Nether realm to serve the Wraith. Unfortunately, it is quite worthless without the driving force of vengeance. As is said above, the Dead Soul is quite useless unless it is upgraded. It cannot gain levels until upgraded. If interrupted by being damaged while upgrading, the upgrade ends and the gold is wasted.
Icon:

Health: 400
Mana: 0
Speed: Slow
Armour: 0 (Hero)
Abilities: Ethereal Being
The Dead Soul comes from a realm far different than that of the other Builders. The void that embodies it, therefore, can only be harmed by highly potent energies. This is a passive ability which makes the Dead Soul Ethereal. It cannot be attacked by normal moves, but takes 66% more damage from magic. This is the Dead Soul’s only ability, which it starts with.
Upgrades to: Burnt Soul 
(Heavily tinted red)
The Burnt Soul died in a destructive inferno, which reduced her mortal body to ash. As such, she wields the consuming flames as her weapons as she seeks for vengeance. The Burnt Soul is a melee combat Titan Hunter. She has weaker than average hero stats, but her other stats are normal, save for those specified. Though Ethereal, the Burnt Soul may attack.
Icon:

Health: 500
Mana: 400
Attack Damage: 55 (Hero)
Speed: Slightly slower than average
Abilities: Can learn
Blink and
Siphon Mana as hero abilities, but can’t learn
Attribute Bonus or
Avatar.
Ethereal Being
The Burnt Soul comes from a realm far different than that of the other Builders. The void that embodies it, therefore, can only be harmed by highly potent energies. This is a passive ability which makes the Burnt Soul Ethereal. It cannot be attacked by normal moves, but takes 66% more damage from magic. The Burnt Soul automatically has this ability.
Fiery Demise
The Burnt Soul emanates the energy which spelled her doom in life. This aura of fire damages all those who would dare impede her. This is an upgradeable (3 tiers) ability which works just like Immolation. The Burnt Soul automatically starts with Lv1. Fiery Demise deals 15/25/35 damage/second to all enemies /creeps within 150.
Drowned Soul 
(Heavily tinted blue)
The Drowned Soul, in life, was cast off of a ship during a storm. She perished beneath the waves, her soul absorbing the qualities of the sea. Now, she returns to the mortal world, armed with the powers of the ocean, to take vengeance on the lords of the island. The Drowned Soul is a long-ranged Titan Hunter. She has weaker than average hero stats, but her other stats are normal, save for those specified. Though Ethereal, the Drowned Soul may attack.
Icon:

Health: 300
Mana: 400
Range: 800
Attack Damage: 45 (Hero)
Speed: Slightly slower than average
Abilities: Can learn
Blink and
Siphon Mana as hero abilities, but can’t learn
Attribute Bonus or
Avatar.
Ethereal Being
The Drowned Soul comes from a realm far different than that of the other Builders. The void that embodies it, therefore, can only be harmed by highly potent energies. This is a passive ability which makes the Drowned Soul Ethereal. It cannot be attacked by normal moves, but takes 66% more damage from magic. The Drowned Soul automatically has this ability.
Twisting Tides
The Drowned Soul is imbued with the magic of the ocean, and her incorporeal form ebbs and flows just. This makes it quite difficult to hit her, as it looks almost like there are more than one of her. This is a passive ability with 3 tiers, which gives the Drowned Soul Magic Evasion (namely, a % chance to evade a spell). She automatically starts with Lv1. This ability gives her a 30/45/60% chance to evade an enemy spell cast on her.
Poisoned Soul 
(Heavily tinted green)
The Poisoned Soul was a queen in life, killed by an assassin. Her ethereal being has since become pure venom, and she deals most harshly with those trying to impede her. The Poisoned Soul is a medium range Titan Hunter. She has weaker than average hero stats, but her other stats are normal, save for those specified. Though Ethereal, the Poisoned Soul may attack.
Icon:

Health: 400
Mana: 400
Range: 400
Attack Damage: 35 (Hero)
Attack Speed: Slightly lower than average.
Speed: Slightly slower than average
Abilities: Can learn
Blink and
Siphon Mana as hero abilities, but can’t learn
Attribute Bonus or
Avatar.
Ethereal Being
The Poisoned Soul comes from a realm far different than that of the other Builders. The void that embodies it, therefore, can only be harmed by highly potent energies. This is a passive ability which makes the Poisoned Soul Ethereal. It cannot be attacked by normal moves, but takes 66% more damage from magic. The Poisoned Soul automatically has this ability.
Corrosive Being
Every word the Poisoned Soul utters drips with the venom of her death. She infuses it into every aspect of her spectral existence, and corrupt her enemies’ bodies with it, weakening them to the point of death. This is a passive ability with 3 tiers which works exactly like Slow Poison. The Poisoned Soul starts with Lv1 automatically. The Poisoned Soul’s attacks, because of Corrosive Being, give a non-stacking buff that deals 5/10/15 damage/second, slows movement speed by 10/15/20%, and attack speed by 5/10/15%. This buff lasts for 5 seconds.
Empty Pedestal
The Wraith can construct Empty Pedestals, upon which she can mount gems of power. These gems can launch powerful bolts of energy at nearby foes. Empty Pedestals are the Wraith towers. They cannot do anything when first built but be upgraded along one of three paths. They have the same stats as unupgraded towers except that they cost 50 Lumber and 1 Food.
Icon:
Upgrades to: Pain of Death
The Void Crystal placed atop the Pedestal is charged with a soul that is burning with hatred and anger. Those hit by the bolts of energy which fly from the crystal suffer physical pain as the age-forgotten fury passes through them. The Pain of Death is a very powerful yet slow and short-ranged tower. It is best to place them towards the front of a base. As normal, they require a Merchant for the final upgrade. They have average stats save the following.
Icon:

Upgrade cost: 125/250/500 Lumber
Attack Damage: 75/90/115 (Piercing)
Range: 400/450/500
Attack Speed: Slightly faster than Pirate
Upgraded Forms: Searing Pain of Death, Agony of Death.
Chill of Death
Atop the Pedestal is placed a Void Crystal, full of nothing but the pure emptiness of the Void realm. Any touched by energy from the Chill of Death feels the burning cold of the Void as only a mortal can. The Chill of Death is a medium ranged tower with a slowing attack. They have very low damage, however, so it is best not to have too many. As normal, they require a Merchant for the final upgrade.
Icon:

Upgrade Cost: 125/250/500
Attack Damage: 5/10/15 (Piercing)
Range: 500/600/700
Buff Duration: ½/1/1½ seconds
Movement and Attack Speed slowed (non-stacking): 10/15/20%
Upgraded Forms: Deep Chill of Death, Frozen Chill of Death
Arm of Death 
(with a Shade hovering just above the Ziggurat)
Instead of a Void Crystal, the Wraith places an advocate of Death atop her Pedestal. These minions have a wide influence, and can reach out and snatch away a life with ease. The Arm of Death is a VERY long-ranged but weaker tower. It’s best to spam them at the back of a base. As normal, they require a Merchant for the final upgrade.
Icon:

Upgrade Cost: 125/250/500 Lumber
Attack Damage: 15/25/35 (Piercing)
Range: 800/900/1000
Attack Speed: As Makrura equivalent
Upgraded Forms: Long Arm of Death, Eternal Arm of Death
Circle of Power (ARC)
By weaving ancient magics into a bizarre architecture of stone and bone, the Wraith can create a Circle of Power, where she can learn the deepest secrets of Void powers. Icon:

The Circle of Power has all of the normal stats for an ARC except that it costs 25 Gold and 2500 Lumber. Does NOT require a Merchant.
Researches: Primary Scrolls of Ritual
The Wraith reads the first set of the cursed Scrolls of Ritual, teaching her how to drive on her allies with a frenzied rush of power. Slightly improves the Wraith’s Mana Regeneration and gives her the spell Ritual of Insanity. 10 Gold, 2000 Lumber, 90 seconds.
Secondary Scrolls of Ritual
Continuing with her studies the Wraith discovers the secret of spirit control. Slightly improves the Wraith’s Mana Regeneration and gives her the spell Ritual of Possession. Requires Primary Scrolls of Ritual. 20 Gold, 2500 Lumber, 90 seconds.
Tertiary Scrolls of Ritual
The Wraith completes her training in the darkest arts, learning how to return to the mortal world, even after being banished. Further improves the Wraith’s Mana Recharge by a small amount and gives her the spell Ritual of Resurrection. Requires Secondary Scrolls of Ritual. 30 Gold, 3000 Lumber, 90 seconds.
Crystal Lore
The Wraith learns ancient secrets about the mysterious Void Crystals, learning how to further exploit their power. Lets the Wraith use Ensoul Crystal and causes Void Crystals to deal 100 damage/second to themselves whilst using Shatter. 800 Lumber, 75 seconds.
Spirit Thief
The Wraith natural malevolence overcomes her as she attempts to preserve her own lexistence at the sake of other, manipulating their souls so as to stay real. The Wraith learns the spells Embody and Drain Soul. 20 Gold, 30 seconds.
First Key of Hades
The Wraith manages to steal one of the keys of Hades, releasing a Dead Soul into the world. Allows the Wraith to Summon a Dead Soul at her Research Center. 5 Gold, 500 Lumber, 5 seconds.
Second Key of Hades
Using considerable cunning, the Wraith manages to snare a second Key of Hades, which she can then immediately use to free another Dead Soul. Lets a second Dead Soul be summoned from the Research Center, which can then be upgraded into a Titan Hunter that the Wraith player does not already have. Also, this technology improves all of the Wraith’s Titan Hunter’s unique Passive abilities by 1 tier. 20 Gold, 500 Lumber, 30 seconds.
Third Key of Hades
Utilizing all of her skill, the Wraith snatches the final Key of Hades. Lets a third Dead Soul be summoned from the Research Center, which can then be upgraded into a Titan Hunter that the Wraith player does not already have. Also, this technology improves all of the Wraith’s Titan Hunter’s unique Passive abilities to the final tier (tier 3). 30 Gold, 500 Lumber, 180 seconds.
Implements of Torture
The Manacle Walls are haunted by the spirits of the tortured, who prey on the clean consciences of nearby enemies. Improves the armour of Manacle Walls and Enforced Manacle Walls by +5 and gives them the Spirits of the Tortured ability.
Infantry Survival Training, as usual.
Merchant- Exactly the same as normal
Ultimate Towers: Hell’s Grip
Hell’s Design Doom Chariot
When Death hunts, he rides aboard his mighty Doom Chariot, a horrendous device which inspire fear in the hearts of all. This is a powerful, unique Ultimate Tower which the Wraith can purchase. Costs 135 Gold, 3500 Lumber, and 1 Food. Has average Ultimate Tower stats save for the following.
Attack Damage: 180 (Chaos)
Attack Speed: As Catapult Ultimate Tower
Range: 1000
Abilities: Gloom and Doom
The Doom Chariot projects the souls of the damned at its targets. These souls, upon striking, leave a lasting effect on the area they touch, polluting them for ages until purified. Wherever a projectile from the Doom Chariot hits, it leaves a patch of damaging ground (just like the Burning Oil upgrade for Demolishers) which looks like Death and Decay. Enemies standing in such a patch lose 50 life/second. Any given patch has an area of 200 and lasts for 5 seconds. These patches do not damage allies of the Wraith and can be walked through and built on normally.
As an Item: The Doom Chariot gives +10% Movement Speed to the wielder and damages nearby enemies (within 500) for 50 life/second.
Thank you very much for reading through my suggestion. I know that school has started, but I’d really appreciate advice. If you have time, please check out Biosis, Legendary Titan of Mutation or the Tuskarr Builder; neither suggestion has been dropped yet.
Dai-Rukh