Gonna make some noms to get the ball rolling

UR -> A
Pretty great offensively as its fast speed lets it naturally outspeed tornadus and threaten it for big damage with triple axel. Can struggle with coverage as it wants all of flower trick, knock off, u-turn, low kick, t-axel and spikes but can still get work done. Rabia explained it better, so Imma keep this short.

UR -> A-
Rillaboom is not only a great mon in its own right (stop using passive taunt sets and start running a bit more offensive sets), but it also enables a ton of degenerate shit. Just a generally good pokemon that may or may not be banned.

UR -> C
Uhh, stall exists ig? Idk man, watch this rise to OU in like three months and RU missing out on another mon.

C -> UR
See above mon.

B- -> B+/A-
With an actual pokemon in the tier, hawlucha becomes a lot more dangerous. It also benefits a lot more from a defense boost in grassy terrain due to its ability to take priority hits from lokix much easier. Just a general rise to refelect rillaboom being better, either a bit lower then rilla since rilla can work on other teams or at the same rank.

A+ -> B+
Okay, so IDT zarude is completely horrible and outclassed by meowscarada. Setup sets are still superior to meowscarada, as meow doesn't have bulk up, recovery or SD. But pivot sets are just much inferior to meow with no protean, no spikes and no triple axel. Scarf meow is also a lot faster, which is really nice. I think B+ is a good rank to start it at and then we can see if its better/worse then there.

B+ -> A-
Honestly, clodsire has felt really great this meta. Unaware can shut down a lot of setup sweepers you see rn while water absorb beats the broken greninja and the not broken keldeo. Poison jab I've found is nice in order to beat pokemon such as taunt jugulis and tera taunt heatran. In general, its matchup spread I feel is really good rn.

B- -> B
Not going to nom it any higher since I haven't personally used it, but comfey is better with rillaboom dropping, allowing CM sets to be a lot more destructive. Priority in general is really nice in this meta so having that is another bonus.

UR -> C
Weavile leaving? Tinkaton leaving? Rillaboom dropping? Hawlucha getting better? Yeah, get this mon onto the VR. Every shift, this mon gets better. Genuinelly shocked it isn't ranked. If you want reasonings, go to my post
here to see more. Oh, also it can work on offense, particularly sand which patches up the grass type weakness, especially to rillaboom, pretty nicely.