>>58711036Aura sphere isn't the problem, Mewtwo has 4 moveitis and aura sphere doesn't cover much.
It's everything else that 1hkos Ttar(even using AV), like Xerneas Moonblast, or Chomp's EQ, or the odd fighting coverage like focus blast, Clawitzer hydro pump, which makes it unviable.
I run fighting moves on mons that Ttar should theoretically have a favorable match against like Zard Y, but I can force a KO trade or a win if they didn't use a plus move to deal with protect.