So I was competing a bit in the competition last night, and I was using a set on Dnite that I had adapted from singles. I ran Dragon Dance, Fire Punch, Iron Head (I don't understand why no one uses this move on Dragonite, it's super effective against every type Dragonite is weak to save for Dragon itself) and Dragon Claw.
To save Dragonite from its mediocrity in doubles, its co-lead was a Mega Lopunny which ran, namely, Fake Out.
With a turn of Dragon Dance setup, and multiscale support in the case the Pokémon not flinched attacked her, she managed to OHKO many of her common threats that I faced, including Mega Gardevoir, Xerneas, etc. leaving me with plenty more wins than losses,
This morning, I happened to take a peek at Dragonite's Doubles set on smogon, which left hardly a sentence without describing how bad it is, and even in Team Options never even mentioned a Fake Out user, instead poking fun at how one should just bring a Magikarp.