Making an arena right now

I’m making an arena where you can choose different characters and fight in a big area with a lot of different building and stuff, any thoughts or ideas for improvement? All in vanilla Minecraft Bedrock with commands! Let me know if y’all want photos. Characters I have:

-Knight

-Archer

-Ogre

-Necromancer (summons zombies)

-Soldier (air strikes and guns)

-Berserker (lifesteal)

-Samurai

-Ninja (stealth)

-Magicbender

-Bloodbender

-Firebender

-Icebender

-Waterbender

-Earthbender

-Airbender

-Lightningbender