custom kit

So I was wondering, "Ok. Eggwars. There is like team mode and solo mode. Also speed round. Cool! But what if there was a way to make your own version!" Like party mode! So it can be a stand-off between you and your friends? Like add a command or other section to make it so the whole party gets...

Idea: Allow for people making Custom PvP Kits to be able to get custom player heads. How to Implement: A command like /head <playername>, where inputting a player name for <playername> will give you that player's skull. If you don't input a name and just do /head, allow for a head library...

I think that when designing a custom PvP kit, there should be an option in "Settings Sid" that determines whether a mob should attack the person who spawned it or not. Simple!