The 93 S&S and 92 190 should have the same hull. The WSM guys may have weighted the nose or something to get it to ride a little more bow down. But it shouldn't need much, if anything, to have a wonderful wake.
Here is a prop comparison
I did on my old 93 205 several years ago. My impression was that the CNC milled prop I replaced my factory 13x13 with improved the wake a bit.
As for chine spray, in no wind, you should be able to get into 35 off without too much trouble. Short of modifying the hull, there's not much you can do about that.
Previous: 1993 Prostar 205
Red 1998 Closed Bow Ski Boat, PCM GT40, 310 hp, Standard Gear Reduction, Acme 4 blade, Perfect Pass SG/Zbox.
Tyler Ski Club
Be kind. Have fun.