AST, Underpowered?, Potential changes, and you.

[SuzakuCMX]

Noct's problem isn't the potencies, it's the fact they don't get the SCH crit modifier. Even as SCH it's horribly inefficient to just sit there and cast a bunch of adlos, but when you get it to crit it becomes extremely effective. Noct has all the mana inefficiency with none of the payout from crits.

Well, this is on top of the fact that they don't have the healing potency to match up with even Diurnal Sect.

On the contrary, I'd posit that if the shield was slightly more mana efficient and their healing was otherwise more or less equal with SCH/WHM, Nocturnal Stance would be fine. Alas, neither are true currently.