Roserade: Ban. Roserade has too many things going for it. The combination of them all makes it completely broken. The first combo is it's insane special attack paired with its ability to abuse staples such as defensive waters, rocks and grounds (except gigalith that has massive spdef and high attack). That gives it the ability to click Leafstorm 2 or even 3 times per battle, and nothing can stomach this except subpar, passive options like Golbat and Articuno. Remember that Roserade is pretty much as powerful as Latios, and that our steels are far less bulky than OU steels. Useless comparison maybe but I like it. Then there are poison types but they don't like switching into roserade at all, especially since they have to be run physically defensively to check fightings: Weezing, Garbodor. Then the second combo is spikes+sleep powder, the latter move allows roserade to prevent defoggers from removing spikes: if roserade didn't have access to sleep powder, the likes of steelvally and poisonvally could be able to pressure it and remove all spikes quite reliably. But with sleep powder, they become useless. I didnt mention roserade's speed, which is pretty good, and lets it outspeed a bunch of threats that would otherwise beat it like toxicroak gallade hitmonlee and garbodor. My conclusion is that roserade is too powerful for PU, abuses staples and can make use of spikes too easily to be allowed any longer in the tier.
Virizion: Do nothing. Virizion is a mon I find to be quite fine. It worried me a bit because of its unpredictability: for exemple, if you send out weezing and that virizion starts using calmmind, your weezing just becomes a free KO for virizion. But after some testing, virizion has appeared to me as just fine. Its biggest flaws are difficulty to switchin on anything and thus setting up, lack of firepower forcing it to setup, and massive weakness to all sorts of speed control. Virizion just seems to get constantly toxiced, glared or scald-burned by the things it's supposed to take advantage of. If you are using a setup set, you have to bring virizion in safely which is difficult, and if you're using LO 4 atks, status+recoil are gonna kill you real fast. But the nail in the coffin is the incredible amount of faster mons that kill virizion: scarfers like Passimian Mesprit and Braviary beat it easily; Ribombee and Whimsicott also RK it without much trouble. 108 speed isn't even that good in the current metagame. And finally the biggest ennemy, Talonflame. Without stone edge, virizion can literally do nothing vs that guy, and the guy is pretty good and splashable. Add to the list of potential revengekillers charizard, garbodor, fairyvally, poisonvally etc, and you find yourself with a sweeper that struggles to setup and cant do more than 1 kill.
Archeops: Do nothing. Archeops was maybe broken in SM, and that was in a metagame without Mudsdale, without any faster mons, and with much weaker mons than now. Not only can't archeops do anything vs defensive staples like Regirocks/Vaporeons/Sandaconda/Weezing, but it's also quite weak (dual wingbeat is only 80 BP) and too slow in a tier with much better glass cannons like Ribombee, Whimsicott, Sneasel, Talonflame and Jolteon. I've tried archeops a lot and it's just disappointing and I couldn't even justify using it besides the fact that it can check Talonflame and charizard once. Maybe it'll be good if the other fast mons rise to NU (but even then it'll struggle with many defensive staples), but for now it's outclassed by all the other faster glass cannons.
Toxicroak: Do nothing. Definitely a scary mon, but it's fine imo. What makes it dangerous is that it can run two separate sets (SD and Nastyplot) equally viably and there's no way you can predict which one it is. And as you probably know, most checks to one set fall flat to the other one: weezing falls to NP, charizard and talonflame lose to SD (gunkshot nukes them), mesprit loses to SD (+2 suckerpunch), Sandaconda loses to NP, etc. Pair that with its incredible typing and ability dry skin and you have a mon that can setup easily on vaporeon, regirock, weezing. The thing is that there isn't so much to set up on, and that even a virtual setup bait like vaporeon can actually use wish while croak switches in and pass it to say Talonflame or weezing. And finally, all our glass cannons can RK croak easily: the two superfast fairies -whimiscott and ribombee- tank +2 suckerpunch and vaccum wave easily, Talonflame and charizard too, Passimian and Virizion too. I think we shouldnt underestimate croak but that it's not broken atm and will in my opinion become a valuable and healthy pokémon (for exemple once roserade leaves I'll be happy to have croak as a switchin to vaporeon).