Re: Mastery [3.5e, Learned Caster Feats, PEACH!]
For Master Archivist maybe make learning a non-cleric divine spell via level up count as two of your (now 3) spells learned via level up?
As for Power Familiarity I like it fine as is, although a feat that adds 1 extra unique power per day (of any level up to 1 less than the highest level power you have?) might be a nice feat as well.
Peanut Dracolich avatar by Emperor Ing.
If anybody is ever interested in playing one of my homebrewed base classes let me know, I'd love to see some of them in play and would try to run a game for it.