A Showdown with Myself?

Today, I tried battling in Future Arc Chapter 2 and 3 with Valkyrie of Rebellion vs. Cat Valkyrie Saint & Rampaging Cat Mutant vs. Awakened Cat Mutant (with walls and combos). I overwhelmingly won against Valkyrie of Rebellion about 10 seconds after the battle started. I lost against Rampaging Cat Mutant with a single wall, so I increased it to two walls and challenged again. Awakened Cat Mutant kept one-shotting me with Rampaging Cat Mutant, so I managed to buy some time with wall characters and barely won with the third production of Awakened Cat Mutant!