Triple battles is what my team is made for.
Dusclops for Trick Room and Gravity

and he has the second highest defense in the game.
Marowak because he's beast (highest attack in game) to spam earthquake with Gravity.
Conkeldurr to Wide Guard Maro-freaking-waks 1-hit-KO earthquake. Conkeldurr can 1KO Mach Punch any Dark type Pokemon
Level 1 Aron, this steel maggot is nearly invincible with 2 moves at level 1.
Camerupt to spam Eruption and Earthquake. Oh, and explode.
Torterra to use Wide Guard as well if Conkeldurr dies.
On deck I have Togetic to use Follow Me while my Dusknior safely uses Trick Room and Gravity without being targeted.
This team brought me to the number 1 spot triple battles and beaten the number 1 launcher battler. I stopped due to the infinite number of ragers making it impossible to boost rank.