Figured I'd jump in on the fun.
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I like the place that the metagame is in right now - while some of these rankings pained me a bit to make, I'm pretty happy with them overall. I'll explain some of the rankings I feel could possibly be a bit eye-raising (
feel free to ask me about any of the rankings I've put as well!)

+
I think that the way these two can not only utilize Contrary, but Tera as well (
along with Scarf for Enamorus and Glare + 3 attacks for Serperior) has a special hold on the meta that feels like it's pushing the limit. They can turn the tables and generally have the advantage in terms of various matchups because of the guesswork you have to do. As much as I love Enamorus and Serperior as Pokemon, they both might be too much for the tier.
Archaludon is one of the single most slept-on Pokemon I've ever seen - amazing offensive and defensive synergy with so many different set options (
no, rain is not the best variant, Dragon Tail + Body Press + Protect with a fourth move of your choice is). It has so many wonderful qualities to it, and its negative qualities (its mediocre Special Defense) are negligible in comparison IMO. Easily my favorite Pokemon to use in OU and I'm hoping it becomes an OU mainstay.

and
Great Pokemon, not OP by any means. Raging Bolt requires using Tera to break through certain archetypes while Kingambit has been suffocated by a huge portion of the competition (
I didn't think King was broken during DLC1 or Pre-DLC either, tbh). Thunderclap and Sucker Punch are both great, not game-breaking - they can be played around with the correct prediction and proper teambuilding.

and
Darkrai feels like a breath of fresh air in the tier and I'm so happy the decision was made to drop him. Hypnosis is the worst set (
called it ages ago), Life Orb + Nasty Plot is the way to go. He's manageable but still strong - Darkrai hates status and requires setup to do quite a lot of the things that it wants to do if it's not running the Scarf variant (
don't run Specs, it's not worth it), in addition to having bad 4MSS. Roaring Moon is extremely powerful and I'm teetering between S and A+ for him frequently, but at the same time, I constantly feel that Roaring Moon dies so quickly and just doesn't get the opportunity to fire off its nuclear attacks - usually sending a Fairy or Fighting attack its way is enough to drop it.
I love this thing - it's not broken imo, it's balanced - sure its Quark speed may be frightening, but generally to hit certain speed thresholds people will be running Jolly, which means Swords Dance is practically a requirement to break through a lot of teams (
this can easily be preyed upon). Iron Boulder suffers from 4MSS as well (
not as much as Darkrai does, but still a notable amount) as it never feels like it can attack all the threats that it wants to attack.
Meow is good, but not OP by any means. Triple Axel is great but generally has plenty of counterplay (
and Archaludon eats multi-attacks for breakfast). Basically - strong fast multi-functional offensive pivot, not overwhelming, at least in my experiences playing against it.
Not sure how I feel about this thing - it's very obviously powerful, varied, and has a lot of utility but is it OP? I think the meta does warp around it, but I'm not sure whether that's from people being paranoid about it due to its bonkers speed, or whether it's warping due to its insane qualities. Every Deoxys-S set has notable counterplay - I think the problem is that multiple sets require multiple forms of counterplay, which, I haven't felt Deoxys-S stretch my focus in the teambuilder - but my Deo-S answer is Assault Vest Kricketune (fun mon btw, Kricketune got better than it was in DLC1), so I'm already using non-meta stuff as is so maybe I'm not the best one to judge Deo-S in that regard. Either way, it's personally not the most threatening Pokemon I've had to deal with in this new meta (
Enamorus and Serperior are).