How about just 2 arenas and have them do different times and different maps each reset. Set the cap to 300 and dial down EMI. It would add an extra quark and give incentive to all, to get use to the different equipment. Perhaps even do reigns so Mid W Asia, Lat W Europe, Erl W Europe, Erl W Asia, and so on. Always a random shot and thus really mix it up. I know the equipment issues would be trouble,, they are now any way though.