Shameless plug…
…would be a good place to start. I would add, from the faction legendaries, the King of Thieves and the Mirror Queen.
For class traits, Knight and Oracle desperately need new traits, they are nigh unusable as currently constructed. Beyond that, Assassin, Barbarian, Diabolist, Hierophant, Necromancer, Priest, Slayer, Warden, and Warlord have underpowered traits that should be buffed.