This would be fun but I noticed a few things that should be changed/tweaked
1. If you zone (ie mini game or anywhere else) you still have the buff and it does not give it to another player) at least make it so you cannot zone with the buff. or at least if you zone give it to another player.
2. Remove the runspeed buff. The point of this mini game is to get kills not run away when you are attacked which I have seen quite a few times.
3. The most important change that is needed in this is being able to kill guild mates. If my guild has a group of 8 people in the zone and there are 3 other players in the zone most of the time my guild will have the buff and there is no way for my guild mates to score points. Now if we could kill each other it will be alot more accessible. Maybe make the whole entire zone FFA PvP During the Gullah event.