I can't suggest a size/pitch, HOWEVER this may help.

A Master Airscrew prop (the black one) is not as efficient as an APC prop. The equivalent is roughly 1 size larger in pitch for the MAS over the APC for about the same performance. If you watch a MAS prop from the side with the engine is running, you will see it "flexes" noticeably more than an APC.

The advantages to a MAS prop is that they are more tolerant of prop strikes than an APC and if you need to slow the plane down for landing these work great (I had to put a MAS on my SIG Rascal in order to get it to slow down enough to land).

The down side to the MAS props is that they are noiser than an APC (about 3 - 5 db). The noise thing may or may not be an issue where you fly.