Currently, swashbucklers add "the highest of leadership, bluff, parry, or intimidate (divided by 5)" to their DC checks for Feint and Second Intention. Bluff, Intimidate, and Leadership are all affected by their Panache ability. Perform is also affected by their Panache ability- but, for some reason, got left out and does not apply to the DC checks for Feint and Second Intention.
I propose that Perform be added as a buff skill to these abilities. It makes more sense to me for Perform to be valid over Leadership, if one of them has to be replaced.