[Landlord79]

My only request would be knee pads, and if they get a matching weapon/ defensive item, knee pads would be of no use to them.

My tactic would consist of running away, resting for the 5 seconds that it takes for them to catch up, running around and throwing heads into the ground and getting in big knees to the kids that allowed themselves to be separated out from the group. Punches would damage your fists too much to be useful en mass. They are too short for elbows. Straight on kicks to their heads and chests would be good in spots, but staying mobile and away from the mob is the most important consideration.

New kids would have to come out in groups of 10 or 15, if not, then they would just swarm you. But if they were released into the arena in groups of 10 or 15 and there was a crew to pull the bodies out, you could take down hundreds.

If there were 100 in a gym, you wouldn't have the stamina nor the room to manuver and you would be overwhelmed or wore out when they started attaching themselves to your legs and over running you. As long as they held onto your arms and legs while you were down, then eventually you would be rendered unconscious. This would be a very slow and painful process.