its not even close to the time being up and they might only need 1 or 2 more players to unlock(whatever it is that gets unlocked) and they go and kill them. I have enough stamina to kill but I usually just stick to 50-60K damage to give others a chance. Am I doing it wrong by 'sharing'? Is there an advantage to killing the boss? and, what the heck DOES happen when something gets "unlocked"?