Technically speaking, every class has auto-refresh, just disengage and you can restore MP. I can understand in terms of Ifrit and any other big baddies that MP could become an issue for Pugilist/Monk however for Pugilist I do see them using this ability:
CNJ Abl. 2 Temporarily halves enmity and gradually restores MP.

While it does appear the only other accesible ability to restore MP outside of it's class it could still be useful. It's also unclear as to how much mp will be drained during the aura effects so it's very possible that it may be able the last til the end of battle, but if it doesn't then just decide the best time to have it active. Since it doesn't seem to be an effect that grows stronger the longer you put it one I can imagine that you would turn off the Fire aura when the mob increases it's defense or is preparing a move in which it would be useless to have it active.

But ya I think until we actually know the perp cost of said abilities it's hard to judge how it may hinder the class as a whole lol.