It's a problem with the maximizer. Try maximizing mysticality manually, putting on the outfit by hand, and save it as "Mysticality". The script should skip that part once the outfit is saved.
You might also have problems with the other outfits. Here is what you should maximize, and the name to use when you save the outfit:
maximize mys, switch Disembodied Hand, save it as Mysticality
maximize mus, switch Disembodied Hand, save it as Muscle
maximize mox, switch Disembodied Hand, save it as Moxie
maximize hp, switch Disembodied Hand, save it as Gauntlet
maximize mp, switch Disembodied Hand, save it as MPDrain
maximize .5 MP Regen min, .5 MP Regen max, switch Disembodied Hand, save it as MP Regen
For the last outfit, named Combat, pick the outfit corresponding to the stat you want to maximize, and save it as Damage.
For people who don't have a Disembodied Hand, replace switch Disembodied Hand by -familiar:
maximize mys -familiar, save it as Mysticality
maximize mus -familiar, save it as Muscle
maximize mox -familiar, save it as Moxie
maximize hp -familiar, save it as Gauntlet
maximize mp -familiar, save it as MPDrain
maximize .5 MP Regen min, .5 MP Regen max -familiar, save it as MP Regen