Finally got reqs, and there's this one really funny Volc set that just completely fucks over the current main rain structure. Props to
Akalli for dropping the heat in their reqs post (personally tried with fiery dance > bug buzz):

Volcarona @ Heavy-Duty Boots
Ability: Flame Body
Tera Type: Water
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Quiver Dance
-
Sunny Day
- Fiery Dance
- Morning Sun
Mono attack is kind of bad against most structures, but fully 6-0's the main rains, it might struggle a bit against Raging Bolt, but you usually win the 1v1. Basically the point is that once you get a QD up, you just Sunny Day and never let rain back up again lmao. Stuff like Archaludon and Barraskewda are entirely helpless if you deny their precious weather, making volc beat em both out, usually without even needing to expend Tera.
Sunny Day is really cool, because you're doing multiple things as once in the rain matchup:
1. Denying Electro Shot from Archa
2. Keeps you faster than Barraskewda
3. Boosts Fiery Dance's power
4. Reduces Water damage, making Aqua Jet Barra deal a max of 55% in sun (beware Tera Water!)
5. Making Peli, Zapdos's and Tornadus-T's Hurricanes not perfectly accurate