In my mono-Fighting, I used a hyper-Offensive team that took advantage of the Drainer move Drain Punch. I had almost everyone in my team running it.
In my current run, a mono-Psychic, I'm using an Offensive Trickster set. Prankster Meowstic M sets up dual screens (and has Charm because of a certain Garchomp), and Magician Delphox steals items.