Also, the Disguise skill in no way helps vs real threats. Shall I list the long list of ways an enemy can determine that yes, you are in fact not alive, despite the pretty facepaint you put on for Mommy?
I would like some of them.
Miss chances
Fellmist Cloak 10+5*essentia invested% vs attacks from 10 or more feet away
Darkness- 20% miss chance, useful for a Warlock with the Devils Sight invocation or At Home in the Deep feat, even more useful with the Intensify Darkness feat which takes it to 50%.
Cloak Dance gives concealment
Psion/wilder and psychic warrior have Concealing Amorphia, and its greater version as 2nd and 3rd respectively.
Binders
Otiax gives 20% concealment
Tenebrous has 50% concealment from deeper darkness. It can see through said darkness.
Shadow Caster
Dancing Shadows is a combination of mass Blur or Displacement 3rd level
Truespeak
Word Given Form a combat style requiring 12 ranks in truespeak and tumble, and 5 feats. Gives 50% miss chance to your dodge target.
Percieve the Unseen 2nd level utterance, grants concealment.