[parcelt]

If I can pick any unit, it would be Lanka's Mandaha. It costs 133 bloodslaves to summon (at B8 I think), but its worth many times that.

How's this:
- he can fly.
- he can command large armies.
- he autocasts darkness at the beginning of each battle!
- he comes with air 3, so you can cloudtrapeze him anywhere, and have him buff with mirror image / mistform.
- he has 65 hps and comes with generally decent stats.
- he is sacred and priest level 3, so he can cast divine bless on himself.
- he is vulnerable to fire and is a demon, so you would want to equip him accordingly.

Properly used and equipped, there's really not a lot that can stand against these guys. Anything but other undead/demons don't have a chance to start, because of darkness. Second, his stats - with air magic buffs and the strong bless you'd probably play Lanka with anyway - are better than any tartarian, wraithlord, demonlord, archdevil, or anything else undead you can think of. These guys are as bad as they come.