Undead only?

[vicheron]

People shouldn't underestimate the Bone Dragon. Their damage is weak but their Poison Cloud ability is very powerful. They're also fast and durable.

You can use the Reaper's Time Back ability to resurrect Skeleton Archers.

Necromancers are just great, and it's not just their initiative and their area damage. Their Plague ability reduces the attack, defense, and hit points of all living creatures by 15%. Their Raise Undead ability works on any dead stack. I often use it to raise dead enemy stacks.