A different game mode in which you spawn at the top of the hill and archers and knights spawn at the base below you and you have to try and stay at top of hill for as long as possible. Count kills as how long you've survived and progressively takes longer to get an upgrade. 5, 10, 20, 40, 80, 160, etc. Eventually might spawn in spidertrons

or jest have it as a cone Shape that flattens at the top and for the spider tron it could be harder if it counts if you are knocked of the top but at the same time jest getting knocked down to the grownd lets the others converge on top!!