As a more permanent solution for Scizor, Gyarados does have a decent special movepool which happens to include Fire blast.
0 SpA Gyarados Fire Blast vs. 248 HP / 0 SpD Mega Scizor: 212-252 (61.8 - 73.4%) -- guaranteed 2HKO
It's a very small niche, but it does also deal with Ferrothorn and...