IMHO This skill needs one of the following:
Smaller cooldown
Longer duration
MORE faster spell speed. Yes, MORE.

I rarely ever use this ability, in fact the only time I really do use it with a technical purpose is during titan heart phase for stone II spam and to help break the first person out. This is the only "planned" purpose. Usually if a situation suddenly turns for the worst, the last thing on my mind is going to be this ability. A precious moment to decide to use the ability and the point after having used it could be the difference between a wipe anyways. That moment could have been spent just starting a party saving AOE heal, benediction, or whatever.