new Doom is really great
steal abilities from neutral creeps, make him imba:
eat wolf - 30% damage aura, 20% critical x2
eat centaur - 2 sec aoe stun, 15% attack speed aura
eat cold witch - free cold attack
eat kobold - 12% move speed aura, stack it with spiritbreakers aura, nobody can run away from you
Use earth spell to get free 20% ms, "radiance" and nice heal.
Doom is great now, but I think he will be nerfed in next version...