Muay thai is a pretty hard-style art. It's a lot of knees and elbows, with some kicks, punches, and grappling thrown in for fun and texture. For nerve-strikes and such, I think you'd usually want a more soft-style. Not to say muay thai doesn't have some, I've only learned some of the more basic level stuff myself, but an art is built on its foundations.
For pressure points, you'd probably be looking for something like hapkido (Korean), taichichwan, or certain other forms of Chinese martial arts. Besides, muay thai is far too... blunt-seeming of a fighting style for me to picture it fitting the Bai branches. Soft-styles are generally more windy/flowy styles, while hard-styles are more direct.