I played a game called Tanarus back in the day, which was futuristic tank combat, with a similar arena format to AH. They had a bounty system built into the game. The more points a player scored on a streak, the more his bounty was worth. When you killed a player, you got his bounty added to your score, and your bounty increased as well. It made for some great bounty hunts which livened up the typical arena combat. You'd get everybody in the arena going after one guy, while his teammates tried to protect him. Needless to say, this opened up the opponents to counterattack in the strat department.