There are a couple of solutions to this. The first one is to use flareon and the second one is to use vaporeon.
Assuming that you can reset evs and natures, you can use this set:
[email protected] Orb
EVs: 212 HP/ 156 Atk / 100 Def / 12 SpD /28 Spe
-Flare Blitz/Fire fang
With guts activated, flareon has its attack boosted by one, which gives it more power. Flare blitz or Fire Fang ohko's scizor, but Flare Blitz can be used to do serious damage to other Pokemon. Will-o-wisp allows you to burn scizor so its attack can be halved. The rest of the moves are coverage moves. Speed evs allow Flareon to outspeed no speed investment scizor.
Alternatively, you can use a second set.
Ability: Flash Fire
EVs: 252 HP/ 252 Def
This set takes a more defensive approach because of the maxed defense and hp stats. Wish and Protect allow you to heal off damage done to Flareon by using wish then protect. Leftovers allow you to gain some hp back each turn, and will-o-wisp can burn scizor.
As for vaporeon, this is a rather shaky check, but it should suffice.
[email protected] Helmet
Ability: Water Absorb
EVs: 252 HP / 252 Def
This is a rather interesting set that forces scizor to switch out. Wish and Protect are used for healing, and scald is used to try to get a 30% burn chance. As for yawn, vaporeon should use this on the first turn, which would make scizor fall asleep on the second turn if scizor does not switch out. Maximum defenses allow you to live most attacks (and live a +2 technician bug bite 68.7% of the time). Rocky helmet deals 17% passive damage to scizor each time it hits vaporeon (barring protects).