I used it in Brayflox on the last boss because the fight took three times as long as it should have. The tank wouldn't move out of the poison attack so it was constant esuna + cure spam on him and sometimes a dps would get caught in it, and then the tank held the boss for a good 2-3 min over the healing poison. I was out of MP for a couple minutes and my summoner buddy was having a hard time keeping them up as I relied on potion and natural mp regen to heal the last half of the fight. When I used it everyone was half hp or under and I had no mana to cast anything else. One of the dps was giving me crap for using it even then. I hate how clueless people are, even though they can see your HP/MP they expect the healer just has unlimited spammable heals for everyone.

I really think limits should be individual, was talking to a friend yesterday about how much rage they're going to cause.