This is well done and interesting. The only obvious comment I have is that it may make sense to make the Kourman psionic, maybe getting 2 power points for free. It seems in keeping with their general feel. Then maybe make their abilities psi-like rather than spell-like.
Thanks, though Power Points would be useless for this monster because Psion isn't a playable class in the campaign setting. Also, the spell-like abilities are from the monsters creation method.