Tinker :
1. Sparkling Shot (kinda fireworks but with AoE or single target)
2. Howling Missile (kinda missile with soul inside that makes the target charmed for 30 sec)
3. Engineering Upgrades/Engineering Aura
Ulti. Extended Hands (2 or 3 machine hands will help the tinker in combat)
OR (1 and 2 can be changed

Craft Inventions (summon a companion. level 1 -> harvester robot. level 2 -> turret o' wheel. level 3 -> clockwork human)
Overload (overload a mechanical unit. make them more stronger than ever)
Alchemist :
1. Steel Cleaner (for repairing mechanical units or something)
2. Custom Potions :
- Simply Poison Potion?
- Crazed Potion (will make the target attack ANYTHING for 25 sec)
- Plaguedeath potion (the effect will make a plague upon the target's death)
- Drunken Potion (the effect will decrease the target's armor and increasing chance to miss)
- Paralyze Potion (the effect will stun the target and also damage the target)
- Cursing Potion (the effect will turn the target into a unit that will belong to you)
3. Modification on the biotoxin ability -> after the target dies, the poison will transferred to other enemies. The poison will be vanished after 3 enemy units die with this poison)
Ulti. Sunray Smoke (the alchemist will create a big smoke that will affect the sky. Calling a very hot sun ray that will burn ALL UNITS in the area)
Tamer :
1. Summon Polar Bear
2. Tracking? (any beasts creep nearby will be noticed in the mini-map)
3. If summon mammoth, you can make the tamer ride on the mammoth OR you can summon another beast
Ulti. Wendigo is a humanoid... why can we tame them? lol
Whipcrack modification -> make all peasants nearby work faster lol