If you're unsure of how to do it really well, I'd advise finding a tech who has solid experience with PRS guitars, because everything depends on the individual guitar.
Action can be affected not only by saddle height, but also nut slot height, string type, and how much neck relief there is - often a neck adjustment solves a lot of concerns.
So first you have to know for sure what will work best on the particular instrument, as there are several variables.
I recently got my Artist V back from the PTC. I sent it there because after a couple of years, I wanted a few adjustments. The guitar was very well set up in the first place with low action, etc. But I had a little fret buzz that I wasn't even concerned about. It came back to me with an even lower action, no fret buzz at ALL no matter how I strummed, and the most buttery playability I have EVER experienced in a guitar.
Absolutely worth it in every way. A true rock star setup. The PTC are the most amazing group of guitar techs out there, IMHO.
But my point is, I'd have thought very little was needed in the way of a setup, and in truth, they took a great setup and made it into an incredible, pro setup I had never even imagined was possible.
So yeah, there's a big difference between great techs experienced with PRS, and the average Joe who can set up a guitar kinda-sorta.
I can't wait to send them my Sig Ltd!