You want accuracy for content where you won't be able to do DPS until everyone is over-geared? Why not try and get more healing potency to actually complete the raids?

If you have time to do DPS without everyone raging at you for killing them, who cares if you misses some attacks? it's not like it will make any difference...

Why not give Mind to Summoner so they can do some healing in Final Coil?

If you're only using 2 buttons, then you are either not the best healer, or you're not doing the really challenging fights... A healer has more to keep track of than DPS too...