Is Necromancer the most powerful and versatile unit in King's Bounty series?

[Autoclave]

If you have moro dark, then you can replenish in crosswordls your undead troops by a few ways:
1. Moro dark convers knights into black knights.
2. In Montero you can also get them from Mesmer, unlimited ammount
3. Dark mistikus gives you Necromancy staff (or whatever its name was) after you complete his quest. It converts peasants into skeletons.
4. Moro dark can convert skeletons into skeleton archers.
5. Cursed ghosts replenish themselves.
6. Training academies allow you to train archmages into necromancers.

So basically only Bone dragon and Ancient Vampires are a little more difficult to find. Everything else is pretty easy.