Turn off Cleric Stance Is pretty much used for DPS as a whm not to be used while healing in dungeon. Turn it on only if you have a good party and you can dps for a short time then turn it back when need to heal.

Cleric Stance:Swaps current INT and MND attribute ratings, while increasing potency of attack spells by 10% and reducing potency of healing spells by 20%. Effect ends upon reuse.