Originally Posted by dextercorvia
Which reminds me... Could a Trumpet Archon take a level of Contemplative and advance its "cleric" casting, or does it have to have a class level first?
I don't see why it would need Cleric levels. As the Unholy One pointed out in his guide: RHD are pretty much class levels. If advancing RHD would advance casting, then I'd say a PrC should be able to advance casting for that monster.
By the way: Damn good work so far, although I have to say reading it is just a retread for me on most of this stuff... Are you planning on doing any obscure and/or non-Core things (like LABO)? That'd be helpful for some of us old-salts.