Yo Joey,
I got a Mega Scizor team here for ya
https://pokepast.es/5207cccf103b333b
This team revolves around Sand Tomb Mega Scizor being able to surprise trap and kill Pex and Fini at +2 with rocks up. Enough speed EVs to outrun standard defensive Heatran and everything else invested into bulk. Heal bell support to not get burnt as well vs Pex
I got a Mega Scizor team here for ya
https://pokepast.es/5207cccf103b333b
This team revolves around Sand Tomb Mega Scizor being able to surprise trap and kill Pex and Fini at +2 with rocks up. Enough speed EVs to outrun standard defensive Heatran and everything else invested into bulk. Heal bell support to not get burnt as well vs Pex