Play as a medic in Hardcore mode with a friend. Go to an area where you
are notified that you are leaving the combat zone. Have the other player
walk out there. Once they die, run in the area, and use the
defibrillator to revive them to get 80 experience points. Repeat this as
many times as desired. *Note:* This can be also be done by finding a
safe location, intentionally killing your partner, and then reviving
them with the defibrillator. Each time this is done you will get 80
experience points but also lose 15 experience points for killing a teammate.