Ttar-M + Flynium Gyara Offense ft Doublade :
https://pokepast.es/a8610261dbfc60f6
So basically the idea is that whatever stops the tyranitar sweep (Keldeo, scarf lando, shuriken gren if ttar is low) should be Gyarados food and vice versa (fat zapdos, scarf latios).
Doublade checks scarf kart, weaken the lando + the team has switchins to most doublade checks
Lack of speed control make the team a bit shaky tho