Obviously personal preference but I use my AP2 PW, then a 52, 56, and 60 vokey SM5. I put the same shaft in my 52 (x-100) as my other irons since I hit mostly full shots with that club. I use a slightly lighter, less stiff shaft (s-400) in my 56 and 60 since I hit a lot more abbreviated shots with those clubs.
Hope this is helpful.

Hey Greg,

Can't tell you positively what is the best setup but I can tell you I just took delivery recently of a set of 716 AP1 tha went 5-W which also include a PW. The wedge is strong with a 47 deg loft. My fitter recommended that I should supplement my AP1 set with 3 Vokey's SM 6 wedges with a 50, a 54 (bent to 55) and a 60 deg. loft. His thinking was the AP 1 wedge (W) pretty strong distance wise so he suggested I go to the 50 to fill this gap. He believed I should go with 5 deg gaps with my wedges. I'll find out how this setup works for me when Titleist gets around to shipping my wedges in the middle of May. Anyway, just thought I throw this info out there to see what you think. It was based on experiences from a very good certified Titleist fitter here is Virginia.

DV