[Nick_K]

1) Not sure how good wailing ladies are as I play sp only and the game is pretty much over by the time they make their appearance. I believe that the attack is Aoe1 Mr resists, although I'm not sure. As for 'range'... I seem to recall that their death attack is melee, unlike the basilisk and catoblepas.

2) If you've played Doms2 you'll know what to expect. You get various ethereal undead. I believe it's dispossessed spirits, shadows, shades and apparitions. The latter have a disease aura. These appear as part of the freespawn you get, although I'm not sure how their numbers are determined. Definitely not as many as the corporeal ones.
I should note that what you get is much more predictable than R'lyeh. You'll get a very similar mix of troops in each province.

3) In SP it really doesn't matter what leaders you use so I'm not a good advisor here. You should get freespawn mound kings. Not sure what the best undead leadership/cost is but maybe censors. The undead clerics have high leadership and can also reanimate and cast useful battlefield spells, so I like to have some in each army.