Murky vs Fenix
Fenix is very much like Valla 2.0. Stronger and better than the original. Fenix has better wave clear and a better escape. Fenix's lazer ability is better against Murky as well. There is just no way Murky can lane against Fenix in the beggining. Just switch lanes.
Once Murky gets Fish Tank Fenix becomes manageable. Murky still needs to bubble for Fenix's lazer ability. Murky can stand toe to toe with Fenix. The only issue is catching him when Fenix uses his teleport. Octo-Grab is good agaisnt as well as Slippery When Wet can help Fenix die like he is supposed to.