Hubaris |
Mountain-Splitting Strike is a personal favourite combined with Horn of the Criosphinx.
Mantis Style would help, as well as Sensei Monk (as you can easily focus on Wisdom) and the Martial Artist.
There is also Stunning Fist Adept if you want to use a Style OTHER than Mantis.
Finally there is a Ki Intensifying Property.
Then you can always cause Shaken (with Intimidate effects such as Enforcer, or Cornugan Smash).
Hope this helps!