Watch the video.
Basics of the drill:
2 on 1
3-5 rounds per fighter
The pair get a limited number of shots (2 per person in the video)
Single fighter gets no limit
Single fighter gets 1 point if the pair run out of shots
Single fighter gets 2 points if he scores a kill
Fighters must stay within a certain position (no moving around the room or running away)
The pair must fight next to each other (no 45s on the single fighter)
The goal is to make the fight competitive. This can be done by having one or two of the fighters fight with their off hand, or reducing the number of shots that they have. You can also allow the single fighter to "escape" (back up for defense) a limited number of times before the round is over. Etc.
