Twilight Domain is awesome. My only wish is that Moonbeam was on its domain spells list.
I like the idea of a wildfire-themed Druid. I don’t get what’s going on with that spell list, and I don’t think a pet fire elemental is my favorite way to express the idea of a Druid with a connection to wildfires.
Onomancy is a very cool concept. I dig the ability to force a creature to reveal its true name, and the free uses of Bane and Bless on creatures you speak the true name of. I hate that you only need to speak one of the targets’ true names to do it that way, though. You should only be able to affect targets whose true names you know when you cast them that way, IMO. I don’t “get” resonants. They don’t seem to fit the theme to me, and the mechanics are messy and awkward.