Interesting, so this means that at 15th level the Chameleon spends his first Extra Slot feat, and at 18th the second, so technically this frees the feats at lower levels for other things until they reach that point, am I right? So if he makes a Factotum 4/Cloistered Cleric 1/Chameleon 5 to begin, with the Planning domain from Planar Touchstone he could also apply DMM to the Chameleon divine side, which also allows for fun times? -no other buffer available in the party, and as they are at the moment high OP, I think it won't imbalance things-