Might I also recommend some ambush feats to help bring the flavor of the acupuncturist and that are mechanically useful.

Weaken the Heart (Dragon Mag): DC is 10 + 1/2 class level + int, lasts 10 minutes, any time they do a str/dex/con based skill check they become fatigued... if already fatigued, they become exhausted. Really nasty but for the low low price of two sneak attack dice. Add in a quick bullrush and you can fatigue/exhaust someone yourself.

Staggering strike (CA): Anytime you hit someone with a melee sneak attack they must make a fort DC damage or become staggered. Limits enemies actions on there round.