If you have a good competitive moveset for Nickit, post an answer below and upvote the best ones.
Be sure to include full set details in your post, e.g. items, abilities, natures and EVs. Some detail, including the intended game mode for your set, is also appreciated. Access the full list of guidelines here
Nickit Pokedex and learnset for reference
Nickit @ Life Orb / Eviolite Ability: Stakeout EVs: 236 SpA / 236 Spe / 36 HP IVs: 0 Atk Timid Nature - Snarl - Mud Shot - Nasty Plot - Taunt / Round
Nickit @ Life Orb / Eviolite Ability: Stakeout EVs: 240 Atk / 200 Spe / 68 HP IVs: 0 SpA Jolly Nature - Play Rough (to counter Fighting) - Howl / Taunt - Knock Off (will get rid of troublesome items helping your opponent) - Sucker Punch
This is my first moveset answer, sorry if I did something against the rules. Both Howl and Taunt are good status moves, especially in Competitive.