My thought process was that Garchomp is already too good, even with tinted lens Flygon is WAY overclassed. I guess it can freely spam outrage, but that's coming off of a shabby 100 Atk. stat =/ It already has EQ to hit steels, and tinted lens gives outrage 30 more BP, which isn't too much. Forry laughs at Flygon using any physical move save fire punch, though flygon should probably be carrying fire blast.
252 Atk Choice Band Tinted Lens Flygon Outrage vs. 252 HP / 252+ Def Forretress: 139-165 (39.26 - 46.61%) -- guaranteed 3HKO
252 Atk Choice Band Flygon Earthquake vs. 252 HP / 252+ Def Forretress: 117-138 (33.05 - 38.98%) -- 6.98% chance to 3HKO
252 Atk Choice Band Tinted Lens Flygon Outrage vs. 252 HP / 252+ Def Forretress: 139-165 (39.26 - 46.61%) -- guaranteed 3HKO
252 Atk Choice Band Flygon Earthquake vs. 252 HP / 252+ Def Forretress: 117-138 (33.05 - 38.98%) -- 6.98% chance to 3HKO