Replace Ferrothorn. Two steel types in OU will be dealt with y the likes of Choice Scarf Hydreigon (Flamethrower), which will most likely take out Ferrothorn in one hit. Dragon Dance / Life Orb Dragonite (Fire Punch) also takes it out with a single hit. Nasty Plot Togekiss also takes it out (Aura Sphere). Reuniclus (Focus Blast), Iron Fist Life Orb / Blaze Infernape (Flamethrower / Fire Punch), and Garchomp (Flamethrower) also take out Ferrothorn in one hit, with the exception Garchomp (2HKO).
I suggest Eviolite Dusclops, Rocky Helmet Cofragigus, Moxie Gyarados (with Substitute), Eviolite Porygon2, Eviolite Chansey, Choice Scarf / Leftovers Togekiss, Eviolite Golbat, Prankster Sableye, etc. Try to fit a Pokemon in that covers your weakness and not one that will expand it.
Ferrothorn is 2x weak to Fire as it's Grass/Steel as is Scizor, so having two Pokemon with the same type weakness will be detrimental.