Played a bit more yesterday with this mod.
The female water troll (the Conjuration 2 W2, 5 W gems spell, name escapes right now) is just amazing value for the price for certain nations. Hello Bane Lord who is cheaper, easier to get, regenerates, is blessable, has massive leadership, can lead land-bound troops under water and is not undead
Ok, she has pretty high encumbarance, but a minor earth-bless negates that.
Seems to me to be too good to be true, but might of course feel very differetly in a real game...
EDIT: Now that I think of it, not sure if the trollette is available from something in CPCS instead rather than UWGIM, as I had both those enabled (with CBM1.5 and the no-gem-generators -mod).