Don't get your hopes up, this isn't going to happen any quicker than a "fighters only" arena, or a "win the war only" arena.
Everything in this game is here to be used to have combat. If that means having a bunch of GV's in a line so an IL2 can roll in and pop them then thats whats going to happen. The counter to the IL2's is to have Ostys and Wirbles around to cover the tanks.... kinda like fighters to cover the buffs.
Your time would be better spent changing and learning new tactics than it would be to try and design a new arena.