How many 5 year-olds.....

[Losing all]

I think 30 is way too low, even under the assumption they're highly motivated and fear failing this task more than being maimed or killed in action. 5 year olds have no power, no speed, and no height. You wouldn't need power kicks, hooks and uppercuts. more like light jabs and a stomp(this would save a lot of energy).

They'll never reach your head while standing, so only 2 ways to lose. get totally gassed, or taken down and stomped (and they'd probably need to get you down several times before they could keep you down)

People are seriously overestimiating 5 year olds here. I'll say 100, maybe a lot more.

9 or 10 year olds would be a different story. Would you rather do this (to the death) against 100 5yr olds, or 25 10yr olds? I'd take the 100