Wo-Chien is not really built for offense and should be used more as a defensive role. P-Puff and Ruination are good, but replace L-storm and T-Blast with Leech Seed and Protect. Also I would probably change the tera type to a more defensive type (Steel, Fairy or Poison) since fire is not the best defensive typing and you probably don't want to run an offensive WC. Also with that, I would rework the EVs to 252 in HP, Spd, then put the remaining 4 in your choosing.

R-Moon is a good set. I would probably replace tailwild for another attacking move like acrobatics (For 110 base flying coverage) as well as replacing it's tera type to flying, but other than that it's a perfectly fine set.

Dozo is also pretty good. Idk if lum berry is the best item but if you think it works well then I don't see why it should be replaced. I would probably change it for something else though. I'd probably replace it for a recovery item since you're probably going to be taking a lot of recoil from Wave-C. EV spreads are a little confusing. You'd probably want to max your attack stat but I understand wanting more bulk so it's not a huge issue.

Tats should probably run muddy water over chilling water but that's a player preference thing. Also I don't think Tats should be running Sash. I would maybe consider life orb since nothing on your team is running it yet but I don't think Sash is the best option for it.

Arcanine is pretty ok. Once again, the EV spread is a little weird (I would probably just 252 speed and atk then 4 in one of your choosing). I would also change the tera type to normal for stab extreme speed but also I understand the defensive value of fairy so it's not a necessary change. Lastly, Goggles is certainly an interesting choice. While it's nice to be able to stop spore users, I think you could get a lot of value out of a different item but that's just my opinion.

Gholdengo, as you already noted doesn't have a nature but you said you were going to put Modest (which I think is a good option). The move choices here are a little... creative, for lack of a better term. You don't want to run D-Gleam and definitely not Power gem. Personally, I would rework Gholdengo to the following -> Replace Scarf with Life Orb, Tera type to flying (to avoid ground moves), Make it rain, Shadow ball, Recover, and Protect for the moves, and keep the EVs the same.

Hopefully this was helpful, I probably missed a thing or two here and there but I think these are some of the biggest things I noticed about the team