Time for some Pathfinder!
Reckless Assault prerequisite: Stunning Fist benefit: you can choose to take a -1 penalty on an attack that delivers a stunning fist to increase the DC of the stunning fist by +1. When your base attack bonus reaches +1, and every 4 points thereafter, the penalty increase by -1 and the bonus increases by +1.
Thoughts gang?
Throat Punch Games 