Oh, BTW, any common undead (soulless, longdead) benefits from regeneration when the ad hoc unholy prayer is cast. It sure doesn't make CW overpowered, but is it a wanted feature or an oversight?
So far, I can't say I saw any good reason to pick Growth+3 instead of +1. (1) It costs points (2) The few extra manikins you might get aren't enough to compensate the fact invaders get extra supplies from your higher Growth scale (I'm not 100% positive on this, but I think they get extra supplies from it)
Otherwise, I second Zen's comments on every point.
And I really like his suggestion about turning provinces into forests.
