Unless the fight is heavy winded, I don't find myself gasping for MP to much. I do have a supply of X-ethers on my hotbar just incase and assuming I get lucky with Spear (which always goes on my spread if I can) I will use that and L.Aether to restore my MP once I am a couple thousand down. Works even better if I can pop L.Aether followed by collective unconscious to shield/heal the tank while restoring my mp.