Ostentatious Weakness (Combat, Performance)Source Inner Sea Combat pg. 12 (Amazon)
You use knowledge of your hated foes to please onlookers.
Prerequisites: Base attack bonus +5, favored enemy class feature.
Benefit: When you spend a swift action to attempt a performance combat check, you may add your favored enemy bonus to the check if you’re fighting a favored enemy.Source Weapon Master's Handbook pg. 25 (Amazon)
You can spend 2 stamina points to select another type of favored enemy (and subtype if humanoid or outsider is chosen). For the purposes of Ostentatious Weakness, that type counts as having been chosen with the favored enemy class feature, with a bonus equal to your highest favored enemy bonus.