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Just in case anyone is having trouble with randos online, i was able to solo it entirely with Bellibolt (also had Intimidate Corviknight NPC)
Bellibolt @ Metronome
Ability: Electromorphosis
Tera Type: Electric
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
Parabolic Charge
Electric Terrain
Light Screen
Acid Spray
I set up Acid Spray and Electric Terrain before just shitting on it with Parabolic Charge. It's a little high risk/high reward style because Earthquake can fuck you and at one point it actually attacked twice in a row, but Parabolic Charge will basically fully heal you.
The build didn't really work with multiplayer I think because there's just so many people doing their own strats (or because most players are retards) however i did see a lot of value in Miraidon with its standard strategy and actually had a really useful Cresselia support mon in one battle.