And the economy would really be just for shops, and for trading, but if you guys really don't want it, that's fine. Rewards for rounds in the mob arena would be items I think.
Final Boss: Creeper Quartet
All you have is a wooden sword. no armor.
Make it out alive and you get a stack of diamonds.
Also, next map change, could I make the little spawn area or atleast some kind of public building?