I honestly can't say its worth it myself either. I've tried several times and I can't tell a big difference. In a way it does FEEL like its helping in Nocturnal, I can pop Aether, top up the tank, throw a shield and cast Collective Unconscious to allow myself time to regen MP but I honestly can't say for sure. I look at the damage the tank takes during this time and I don't see much, if at all, any real reduction in damage.