here's some noms while I'm on break, including a potentially controversial suggestion that I feel is the best solution for VR accuracy.
Rises:

->
S+
I understand VRs tend to shy away from subranks in the S tiers, but truthfully there just isn't a better way to characterize the meta and especially this mon. While Ho-Oh and Kyogre are amazing, lots of teams can justify dropping either or both. The same is just absolutely not true for Koraidon; unless you're using stall (which isn't really in the best place rn) there is literally no reason to drop Koraidon. It's nigh-mandatory and firmly in a class of its own.

->
S (2)
The reason I feel subranks in the S tiers are needed is because of Ho-Oh and Kyogre, who are just straight up better than everything in the A tiers. Their splashability is so great that it's quite uncommon to not see at least one on any given team, and they both consistently significantly impact every game they appear. Kyogre is similar in viability to the currently S-ranked Ho-Oh, which warrants Kyogre being in S as well.

->
A (3)
Arguably the best non-Fairy Arceus in the tier, only things that keep it from rising higher are that it doesn't fit on HO at all and can sometimes be passive in sun

->
B+
Highkey this mon is super underrated, its been seeing more usage and wins since UPL but there's more room for experimentation with this mon imo. Outside of the Tera Ghost CM Taunt set used on HO, it's one of the better Arceus formes on bulky offense teams electing to drop Arceus-Fairy. It's a CM Arc that actually threatens Ho-Oh and Kyogre with STAB which is insane, plus has coverage to take on the few Electric resists in the tier in conjunction with Tera. Defensively, it helps its team play around Zacian and to a lesser extent Ho-Oh. Ofc it isn't perfect in the latter role, but a Zacian check is a Zacian check no matter how you slice it.

->
B+
Spikes are good and this mon is a decently sturdy Spiker and phazer vs mons like Koraidon and Zacian, even if its not perfect. It also doesnt have the passivity issues that Ting-Lu and Gliscor tend to run into because it actually has an offensive profile. It's being used and winning more than ever in important games to the point where C+ rank is doing it a disservice.

->
C+

->
C
Will have to see more of these two before I can confidently rank them any higher, but they've been seeing scattered usage and success and deserve to be ranked.
Drops:

->
A- (3)
CM feels insanely underwhelming and I often feel like bulky teams with it would much rather be using a different Arceus, DDance is good (especially mixed) but really doesn't fit outside of HO. Groundy is good ofc, just not splashable enough to warrant any higher than A-.

->
B-
This mon just doesn't see much use anymore as the teams it used to do so well on have been struggling to keep up in this meta. It's passive, not a good defensive answer to the top threats, and hard to justify over mons like LandoT, Groudon, and Ting-Lu. It's a staple on stall, but stall itself is not in the best place right now so that doesnt mean much.

->
B
Passivity, lack of recovery, and weaknesses to top mons has been hurting it for a long time, made even more prominent now with the return of Groudon who isnt passive and lacks important weaknesses that Ting has, most notably to Korai, Zac, and Arceus-Fairy. Being the best Etern answer is valuable, and it's sturdier against niche CM Arcs, but Groudon matches up better into the top mons overall which has hurt Ting a good amount.

->
B+


->
B
HO is real and you have to respect it, but it's just not consistent enough to warrant the current ranks for the HO leads.


->
B-

->
C+
These guys just haven't been seeing nearly as much usage or success as they used to a couple months ago, certainly not enough to remain in their current ranks.


->
C+
Both of these mons have been fraudulent for a long time, they're okay into bulky offense but their nonexistent defensive profile has kept them from being much more than paper mons that just suck to actually use, and both are rarely used as a result.


->
B-
Screens are fishy, moreso than the other HO styles, but it occasionally has its moments which is why Grimm is not lower. KyuB's awful defensive profile makes it more or less tied to screens, so it should be in the same rank as Grimm.

->
C+
This mon is good on paper, but in practice there's just always better options than this mon to the point where it just doesn't fit on more than a handful of teams.




->
C
Stall has its moments sometimes but it's just too fishy and inconsistent to bring in important games vs good players, it just hasn't been seen tour use in a hot minute and thus doesn't deserve to be ranked anywhere higher than C.
There are also many Pokemon that are only ranked for "vacuum niches;" that is, niches that a mon technically has that pushed it onto the VR, but in practice do not make the mon worth using. The full list of these mons are:
- Chien-Pao
- Mewtwo
- Rayquaza
- Alomomola
- Arceus-Poison
- Garganacl
- Gouging Fire
- Zekrom
- Everything currently in C and C-
I am suggesting all of these mons to be dropped to D rank or unranked.
Finally, my personal VR. All mons are ordered by viability in their subranks until B+, at which point all mons are ordered alphabetically. Anything not listed is unviable. (unless I forgot something)