Just got my backside handed to me as Ghorst
Was heading to take nagashizzar, raiding so I could get there without taking attrition, and trying to provoke the skaven there when they ambushed me.
I started laughing, massive "now you're trapped in here with me" vibes.

Unfortunately I did not, in fact, have them right where I wanted them.

Ran the hexwraiths ragged chasing off skaven guns which was pretty good - their missile infantry got almost no kills despite a double stacked line of zombos.
Unfortunately I neglected to pay attention to winds of magic and ghorst was only level 15. I got off around 3 of the healing spells and one vanhel's dance and they just attritioned me down from there.
Hell pit abominations and mutant ogres really put in some work against a zombie stack.
Worst part is it seems to have provoked the AI to train units repopulating their stack, and now they have TWO full stacks.