In my opinion this isn't a "discussion" question, as it asks for the best Pokémon, strategies, teams, etc., basically what the metagame is looking like right now. That isn't subject to discussion; there's a certain viability ceiling for every Pokémon and the metagame as a whole. I agree that, if this is answered, it would be required to get updated every time a major meta shift happens, which is extremely common right now because BDSP metagames are fairly new. But an answer in accordance to what are the *current* tier trend is would be good enough for the OP, thus resolving the question. This is almost on the wrong side of 1.4.3 and 1.7, but is not extremely vague/unclear and isn't endless as the meta would stabilise in a short time.
A similar question was asked for Pure Hackmons. It was vague at first because of the lack of good players (in PokéBase) + the initial confusion around the question, but it was resolved eventually. It would need fixing in some time because the meta has shifted a lot (ladder received a lot of positive response in 2021's closing), and I'm ready to do that soon. So if someone is well versed with BDSP 3v3, in my opinion this doesn't cross the rules.
Link for reference:
https://pokemondb.net/pokebase/389714/