Last time around, I mentioned how the raid boss having an ability that's useful for blunting its own assault means that Skill Swap and Trace users have a leg up.
That might be settling in as an intentionally designed feature.
Stantler @ Eviolite
Ability: Intimidate
Jolly Nature
EVs: 218 HP / 252 Def / 40 Spe
- Role Play
- three of Skill Swap, Helping Hand, Sand Attack, Rain Dance, Reflect, Light Screen
The target speed to beat this time is 236, so the path of least investment to 237 is 40 EVs and the + nature. With that, you can Role Play before the obvious turn 1 Eruption, then you're immune to both special attacks, and the physical attacks have been weakened by Intimidate and almost full Eviolite bulk so you basically don't have to worry about your own HP forever. Even after the pozwipe disables Flash Fire for a turn, simply tanking an Eruption isn't too bad (thanks Wyrdeer, just for existing, despite being barred from Paldea yet!)
The reason to run both Role Play
and Skill Swap is so you can take the boss's ability, Skill Swap it to a teammate so they don't have to worry about Eruption either, then use Role Play to copy it back
from the teammate (not the boss, in case the shield is up). Meanwhile, the boss thinks you don't have Flash Fire on the second Role Play turn, and have that tempting uninvested SpD stat to aim for...whoops! Alternatively, if one of your teammates is Defiant Annihilape, you can use the sequence Skill Swap-Skill Swap-Role Play rather than Role Play-Skill Swap-Role Play, as that forces the boss to use an Intimidate that nets +1 Attack.
Some teammates like Miraidon or Iron Jugulis are impossible to Skill Swap with, so you won't always be able to set up blanket immunities for the strongest move all around, and if someone brought Azumarill they likely aren't going to appreciate being swapped, so there's still some benefit to using Rain Dance, not to mention reversing the weather affects everyone all in 1 turn rather than taking 6. Sucks that Stantler doesn't get Mud-Slap for hitting through shields, and has to make do with Sand Attack instead, but it's something to do early on if you're not using the "pass the escape pods" approach.