One simple nerf that will really help is remove healers ability to Cleric Stance during PvP. They didn't mind removing Resurrection from SMN and nerfing our Miasmas did they? That weighed down effect from disease... Oh how I miss thee.

Back to the point, the reason 8 healers are so powerful is because they can Cleric Stance and become DPS but if things start getting bad they remove it and spam cure lol I honestly feel removing cleric stance would be the best solution. I often play on WHM myself and I wouldn't mind it one bit. Also, how about putting Equanimity a 1 min timer eh?