For Rogues this is a 10th Level Ability. I'm not sure I'd hand it out at Level 1.
Yeah, I, of course, thought of that, and you may be completely right! What happened was that I then compared this to
Moment of Perfect Mind which can work against things with shorter durations or, say, the
Inflict X Wounds line that aren't even [Mind Effecting] despite being will saves... And stances are supposed to be BETTER than Counters (or Strikes, or Boosts, or...) and have a higher opportunity cost both in selection and use. Granted this DOES let you not Expend a maneuver on a save you turn out to roll high enough on you didn't NEED the maneuver, and can technically go off more than once in an encounter without the need to spend actions(or wait for re-Granting in the case of a Crusader using a feat to buy
MoPM cross-class) to get the ability back. But still, it FEELS weak enough to be on-par with
Moment of Perfect Mind regarding the level you can access it...
So, I went ahead and made it 1st level to start with... Maybe 3rd or something, probably not 5th (which is what it would need to be to come online at 9th which is only one level earlier than a rogue gets it).
So... after considering the arguments on both sides of the question, what level do people (including you my good friend Bhu) think it should be?
EDIT: Of course,
Moment of Perfect Mind also requires skill points...