PvP power will be your best primary stat for sure. This effectively makes jewelcrafting useless (as the pvp power/agi gems are better for reds than the actual JC gems) for those wondering.
Your best secondary after 3% hit is a tossup between crit and mastery. Crit affects everything and will increase your burst potential while mastery will be a static DPS increase while you swap targets or while off-target. Different players choose different stats so it's all preference between those 2. Haste is garbage.