Cleon
Legend
OK, sentience it is! Updated with freyar's suggested scores, plus raised Cha a bit higher like Cleon suggested.
Effective caster level 40th for the dispel darkness?
Switch silent aura to Cha-based?
I'm OK with prismatic spray from the gem. Freyar?
Do we want construction for these, or note that they are only created via divine intervention?
Methinks CL 20 would have been plenty for the dispel darkness.
Should we treat the prismatic spray as a SLA or a (Su) attack?
If it's an SLA it may not have a DC suited to its CR, so making it a Su may make more sense. Then we don't need to give it a very high Cha and it'll still get a good DC from its HD. If the latter, I quite fancy making it once every 1d4+1 rounds rather than X/day.