My hunting partner actually owned the PTS233, so I was able to see it in action a lot and I helped him get his setup. I believe there were a few different configurations and I cycled through them and found one that worked well for him but I can't remember which one it was.
He sold his PTS233, so I can't say for sure. For the PTS536, here are the settings I typically run:
Contrast 112
Sharpness 86
Smartscene 18
Gain 141
AGC Speed 55