I'm debating weather or not to use Mega Tyranitar or Mega Mawile. If I use Mega Tyranitar, it will be a Jolly one with Dragon Dance to sweep. I don't know much about Mega Mawile, but I was wondering how it does competitively and if it's worth using over Mega Tyranitar.
I would also appreciate any suggestions of a Pokemon that I can add for my sand team. So far I got Ferrothorn, Gliscor, Excadrill, Garchomp, and possibly Tyranitar