after watching ur last video id say u need a new Mix and Mega team
https://pokepast.es/b377fe5f70bc6759
Deo-S is the best lead in Mix and Mega period. Groudon is Groudon.. Zygarde Mag and Lele are prolly my favorite part of the team. Triple fairy with next level speed control/power. Finally, Coballion is just a monster get +4 and ur can ko some zapdos after rocks.. Tested and u can easily get 1400 Elo with 0 losses