Another Random Set:
Catapult (Dragapult) @Life Orb | Ability: Infiltrator | Nature: Adamant Nature (+Atk, -Sp.Atk) || EVs: 252 Atk, 252 Spe, 4 HP
2.) Dragon Dance
4.) Dragon Darts
-This set should surprise Physical Sweepers with a sudden Will-O-Wisp, and they can't protect themselves from it due to Infiltrator. If they chose to use a Dark-Type to defeat you, use U-Turn and say "bye bye, see you later". 142 Base Speed mean you will out-speed a ton of threats and either escape or cripple them with a Will-O-Wisp. Dragon Darts is obvious, because, why not?
And yet another random set, and this one, I find it fun to use:
Dragapult (F) @Grip Claw | Ability: Infiltrator | Nature: Timid Nature (+Spe, -Atk) | EVs: 252 Sp.Atk, 252 Spe, 4 HP
-Traps enemies effectively. Grip Claw to trap them longer (7 turns), and would surely annoy them. Toxic/Will-O-Wisp is obvious, as well as Protect, for that stall combo. Using Hex will hurt them a lot while they're badly poisoned/burned as well as trapped. You may also use Will-O-Wisp if you trap physical sweepers.
-You don't really need to hit that hard. But you can go choose Modest nature and hit harder with Hex if you're confident about your speed.