I'd probably just go to sleep after a benzo personally, but then I am boring and lacking in binge power :D
I would avoid meph or 4FA personally, and only consider a psychedelic if you don't feel too strung out. If you feel pretty good then why not trip, but I think hammering something like 4-FA or mcat could get your heart pumping weirdly after PV. I have however used methylone after MDPV and I was fine, although I find M1 a bit tough on the heart.
I don't usually crash on the tan PV, just decend to reality and feel a little bluhhh. Benzos and ketamine are good crutches though if you're hurting, or G.