You guys are missing one of the absolute essentials for IF combo: crazed alchemist, 2 in fact. They go great with your shadow word removal in a pinch too. I've tried confuse before, with the idea of having a decent board, healing them with circle and divine spiriting buuut it kinda sucks.
Overall I think the damage otk is better for priest. Really not hard to pump out 30 damage in a turn. Playing against warrior is an absolute nightmare though