okay this psychic/psyshock thing really needs to be cleared up so here it goes:
psychic is far superior to psyshock if you're using the trick room set. literally the only reason you'd want to use psyshock over psychic is for chansey and blissey, but both of those take under 50% from psyshock anyways due to its inferior power compared to psychic, so the pink blobs can just softboiled off the damage and then start laying into you with seismic toss once trick room goes away. tr reun was never meant to handle bliss or any big special wall anyways, it's purely to dump on offensive teams late-game. psychic is always the better choice for the tr set, because if you're using it, you can be walled by physically defensive stuff like gliscor and landorus-t, who you would otherwise ohko after rocks. huge power discrepancy there. as for the calm mind set, i'd still advocate psychic over psyshock, as once again, the only reason to go with psyshock is for the pink blobs, and stall is so ridiculously rare now that those really aren't of any concern. i guess winning cm wars with stuff like latias is also a factor, but reuniclus usually wins those anyways plus they're extremely uncommon in this metagame, so being able to beat much more common stuff, plus having the extra 10 point power boost, is far more valuable than the ability to hit special walls on the physical side.
that's my take on it, makes sense to me.