You do realize that Aerial Ace is a 60 base power move, so even a super effective Aerial Ace will be really weak? Why in the world are you putting Focus Sash on a Pokemon with good enough defenses and then putting 252 EVs into Defense? Why did you give it Jolly if you didn't give it any Speed EVs at all? What benchmarks will Tyranitar hit with Jolly and 0 Speed EVs? Are you seriously going to use the 2 turn dig, which can easily be switched into with Flying types, over the 1 turn, stronger Earthquake?