I don't have FR or OA, but it looks like you guys don't have Tome and Blood.
Fatespinner: Devastating. At high levels, initiative is what counts, and you can reroll this twice. You can use the rerolling trick to set an absurd DC for your spells, coupled with spin. And then anyone who does manage to make it has to reroll their save (Ok, you can only pull this trick 1/day, but still...)
And no one said:
Elemental Savant: Nearly full spellcasting progression, stronger DCs and spell penetration and all elemental immunities.
Others:
Arcane Trickster: The old sneak attack Elemental Orb smackdown: eat 100d6+ damage (beat opponent on Init, throw 15 separate orbs, get sneak attack for each orb)
Templar: Dealt with exhaustively.
Order of the Initiate of the Bow is very powerful.
Lasher is nasty.