Personally, I can see this matchup going a few ways. While yes, Monkey's scenario is possible, consider this: what if both Kessler and Cole prioritzed Evil Cole?
Think about it this way, Evil Cole is the most obvious threat in the battlefield.
1. His attacks are more damaging, which is something both Cole and Kessler would notice after getting hit a few times.
2. His AOE is comparatively massive.
3. He is utterly relentless.
Cole and Kessler would notice all of this and focus more on him as a result.
Cole would go toe to toe with his Evil Counterpart, being weaker but more precise helps with this, while Kessler plays interference. While Evil Cole is unloading everything on his goid counterpart, Kessler could sic drones on him, hit him with clones, take his feet out from under him, or just zap him while his back is turned. His superior speed would allow him to get in, land his hits, and get out while Good Cole capitalizes on the opening he was just given.
After that, it's Good Cole vs Kessler. And we already know how that ends.
On the other hand, Kessler could choose to stay out of it. He's more knowledgeable on his competition than anyone else here, so he'd likely figure he could just let them fight it out while he conserves his energy. Whenever one side gets an upper hand, he could dash in, land a hit in the winning party and dash out, making the fight much closer.
If this works, it'd be Kessler vs Good or Evil Cole. At that point, it'd depend on how good he was at wearing them down prior, so it could go either way.
However, it could backfire. Both Coles are smart, so they could probably catch on to what Kessler is doing and gang up on him. At that point, Kessler is double ******, so it comes down to Good Cole vs Evil Cole.
That fight would be.. interesting.....
Hmm.