10k combat regen is mandatory. It's either 7.50% or 8.50% haste (can't remember which), then crit, then mastery.
I've been gemming spirit/int/pvp resilience. Which is working out very well.
Only thing I'd like more of would be crit. I lack the gear to reforge into more crit at the moment, but once I get my PvP weapon and the new season starts, I'll be pulling ahead. (I dinged 11 days ago, 3 days played time at 90.)