1. What do you believe are the best sets for the following mons?
- Aegislash
- Clefable
- Corviknight
- Rotom-Wash
I definitely agree with others that have voiced their opinion in this thread that Choice Specs Aegislash is the best set right now. Choice Specs-boosted Steel Beam is an incredible tool that can allow Aegislash to get rid of typical checks like Mandibuzz. This can be very useful for Pokemon like Hydreigon and Dragapult. On top of that, Choice Specs Aegislash is very good at punishing Corviknight, which often tend stay in against Aegislash because they can usually overwhelm it in the long-term thanks to Pressure. Because of its ability to overwhelm typical checks, while still breaking through what it already pressures otherwise very well, make it the best Aegislash set in my eyes.
Life Orb Clefable is undeniably still very powerful. However, the metagame has managed to adapt to it very well, and right now, I definitely prefer specially defensive Clefable. In my opinion, specially defensive Clefable is some of the best glue in the current metagame. It provides you with Stealth Rock support, a solid check to Pokemon like Dragapult and Hydreigon, and Wish is an incredible tool in the current metagame because it allows Pokemon that lack recovery like Rotom-H to check Corviknight with much more consistency, for example.
I really haven't been seeing a lot of Substitute + Bulk Up Corviknight lately, but Taunt + Bulk Up and Defog sets are still amazing. Taunt + Bulk Up Corviknight is one of the best checks to opposing Corviknight and can shut down Pokemon such as Hippowdon and specially defensive Clefable very consistently. Corviknight's also still one of the very few available good hazard removers, as it has a great matchup against most hazard setters. On top of that, it has a bunch of interesting options available that allow it to fit whatever its team needs very well. Iron Head is great to check Clefable and Hatterene better, Bulk Up is cool because it can double as a wincon and can help in pressuring the opposition, while also improving Corviknight's Excadrill matchup, U-turn's great for keeping up momentum, Taunt is also cool for shutting down opposing Corviknight and other passive Pokemon like I mentioned earlier, and Body Press can also be helpful to improve your matchup against Pokemon like Bisharp and Excadrill.
I'm not a super big fan of Rotom-W because it's typically walled by Seismitoad, but a set that I've seen popping up more lately is one I quite like. Substitute + Nasty Plot Rotom-W can abuse Pokemon that would normally check it such as Seismitoad, which can really make it a pain as teams aren't very prepared for it. Electric + Dark coverage can oftentimes be a bit awkward, but it still suffices as a balance breaker that nobody expects pretty well. Beyond that, the Choice Scarf set is still quite decent as well, but I don't think I need to talk about that.
2. How do you feel about these mons? Are they good, not that great, underrated, or overrated?
I would like to talk about Reuniclus in particular because I've been playing around with it a bunch lately and don't think it's acknowledged enough right now.
Reuniclus @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 164 Def / 48 SpD / 44 Spe
Bold Nature
IVs: 0 Atk
- Psyshock / Stored Power
- Calm Mind
- Recover
- Thunder
This is the set I like the most right now, there's a few interesting things that I'd like to go over. The EV spread is pretty standard, but I like to run 48 Special Defense EVs because it allows Reuniclus to take Kommo-o on reliably one-on-one. When running Thunder, I generally prefer using Psyshock instead of Stored Power, as I got annoyed at falling behind Galarian Darmanitan and Dragapult a lot of the time when running Stored Power, and it still gives you an upperhand against other Calm Mind users. Thunder is a great option right now because it allows Reuniclus to lure Mandibuzz, which is great for Pokemon like Hydreigon and Dragapult. I also think Shadow Ball has some merit right now in order to pressure Aegislash.
Reuniclus is often disregarded as a worse Hatterene, but its much better natural bulk, access to Recover, and ability to lure typical checks like Mandibuzz, which can be very useful for Pokemon like Dragapult and Hydreigon definitely give it merit over Hatterene on teams.