Can you recall every specific encounter that has a debuff you can remove and which doesn't? Can you guarantee you wont get one of the ones requiring cleansing in a roulette? Is your group expected to wait for your cooldown to swap into Esuna when you end up in content that does have debuffs to remove? Which skill are you going to replace with Esuna when you do swap? Will you swap at the beginning of a dungeon that has debuffs or just at specific fights within that dungeon?