Sandbox mode suggestion Create Game Mode?

It would be cool if in sandbox you can create your own game mode for fun..

I'd create a free for all 20 min game mode all for of War alone. Whoever gets most kills wins obviously.

Maybe have a ton of jungle monsters to farm gold but you can't back you have to walk. No sight stones and only vendors and unkillable turrets in base to prevent camping and so you can buy stuff safely but you can't stay and hide their too long and you get pushed off base after a minute.

Maybe secret vendors hiding somewhere too so you don't have to go to base.

Also would be cool if you can alter the map in sandbox mode..

Just a thought. If you can make your own game mode what would you create?