The main sets I use are SD + 3 attacks, or Roost + 3 attacks. Scizor's bulk is one cool thing about it, being able to set up on like half of the tier is really amazing, and it's low speed can easily be remedied by technician bullet punch.
Scizor is also pretty good on rain, because it's 4x fire weakness is weakened down a bit. However, it faces competition for a mega slot from the likes of mega heracross and mega swampert, both really good rain megas. Scizor is also a really good revenge killer and pivot. U-turn helps it get out of annoying situations, and grabs momentum. Bullet punch is pretty strong for a priority move, and can easily revenge kill weakened frail mons like Latios. Scizor's good defensive typing is also pretty good for a pivot, resisting lots of moves, while being only weak to one type.
Scizor is also pretty good on rain, because it's 4x fire weakness is weakened down a bit. However, it faces competition for a mega slot from the likes of mega heracross and mega swampert, both really good rain megas. Scizor is also a really good revenge killer and pivot. U-turn helps it get out of annoying situations, and grabs momentum. Bullet punch is pretty strong for a priority move, and can easily revenge kill weakened frail mons like Latios. Scizor's good defensive typing is also pretty good for a pivot, resisting lots of moves, while being only weak to one type.