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I think a good set for doubles could be:
* Fake out
* Will-o-Wisp
* Flare Blitz
* Protect/Snarl/Darkes Lariat/Throat Chop
Fake out + Intimidate is pretty great and gains momentum. Or you could go for Will-o-WIsp on a predicted switch, since Intimidate usually force them.
Flare Blitz is a great STAB, and it hits pretty hard, even uninvested.
The last move it's up to your choice.
I don't need to explain Protect, Snarl is a cool support move that cripple Special attackers. Darkest Lariat is his secondary STAB, it doesn't do much, but it's better than nothing.
Throat Chop is less powerful, but it maybe fuck over Sylveon or M-Gardevoir on a predicted switch.