Disintegration Ray should be 16 + MODIFIER, not 16 + ABILITY SCORE, I should think. A small typo, but an important one.
Edit:
Ditto for Implosion Cannon.
I would think the demons would at least need an alignment line so the GM knows how to play them... Really a bunch of fluff on personality, since they might be around for a while, would be a good idea.