mega scizor is only about 75 speed base yeah? Think relaxed would do well on TR team? I know its sketchy lolI use defensive Mega Scizor.
Scizor@Scizorite
Technician | Impish
252 HP / 4 Atk / 252 Def
Defog
Roost
U-turn
Bullet Punch
There is an option is to replace Bullet Punch with Knock Off if bred in 5th gen. You could also run with leftovers for a non-mega set but its not as effective.
I think the closet thing to a defensive Sycther would be Bulky Sword Dance set with Eviolite.