well for 2wd buggy mod I'm a fan of profile 2 in mod with just adjust brakes to my liking. If bite is low, then I lower punch down some. If it's higher, then I raise it some. By default it's at 60% for profile 2.

For 2wd buggy 17.5 blinky, I run profile 1. PWM around 5000, punch 100%, motor timing is different for every motor but my sweet spot with the stock rotor seems to be 45 deg geared around a 5.2 FDR. (34/69 on B4.2)

I have tested the 12.8 rotor and it wasn't for me. I think it may be decent in a truck, but I can't hang enough gear on it in a buggy. I was at 40/69 and still only 80 deg coming off the track.

I have a 12.3 rotor to test but I haven't run it yet. I switched tracks and it was simply too big to run 17.5.

hope this gives you a better idea of the settings that I run. Let me know if you have questions, and make sure you PM me with vehicle, esc, and motor and I'll do what I can