I like Casey's split on the carbs..you can do a 3/4 complex+1/4 simple combo as well, and my persoanl favs are oats & fruit (most common set-up for me: 20-25g from banana, 1 cup (54g) from oats, the rest coming from protein powder, maybe a little skim milk sometimes)..you can do a 15g WMS/large banana/1.5cup oats mix as well..lot to play around with here, just mix & match till you hit your 80-100g target!
As for on/off cycle: I see it as beneficial both ways. I don't do any 'PCT' as I stay away from things that require such, but just because you're running a PH/DS/AAS doesn't negate the need or benefit of Pslin action..I will even argue that if I was running a PH, Pslin would be a necessity! I'd want to give that PH the most friendly environment to work in as possible..