I have a suggestion for your next mob battle I think you should do zombies, skeletons, creepers, and enderman are team 1 vs blazes, robots, wither skeletons, and wardens are team 2 and here is how I think you should set up the battle to get one of the most epic results
Round 1 zombies, skeletons, creepers, and watchlings for team 1
Round 1 rodlings, baby wither skeletons, watchers, and sculk snappers for team 2
Round 2 draugers, kobletons, creeve steve, and endermen for team 1
Round 2 blazes, wither skeletons, relic observers, and shattered for team 2
Round 3 corpse warlock, wadjet, creeper golem, and ender golem for team 1
Round 3 ignited reveant, withered necromancer, relic rippers, and spreader for team 2
Round 4 mutant zombie, mutant skeleton, mutant creeper, and mutant enderman for team 1
Round 4 mutant blaze, mutant wither skeleton, prowler, and warden for team 2
Round 5 mutant jungle zombie, mono eyed skeleton, tremasourus, and end guardian for team 1
Round 5 umuvthi the sun bird, relic annhilator, withered abomination, and guardian of the deep for team 2
Round 6 maledictus, the immortal, tremorzilla, and end keeper for team 1
Round 6 ignis, realmwarden, wither reincarnated, and the nameless guardian