"Since the 3.0 patch, the 1% miss cap has been removed for spells, thus 17% hit is required for a naked, untalented priest to never miss on a raid boss. Always aim to get near (in other words never be far lower or far higher than) the hit cap, which is 288.55 hit rating at level 80 with 3/3 Shadow Focus and 3/3 Misery for non-draenai. Spell hit is factored into the value of an item, but remains separate from the main calculation since spell hit rating is 0 once hit-capped."