I say Greco-roman style wrestling. Round robin type of format with three events. Each competitor gets to choose a venue. Once we have the top two (from the three tournaments), we have a no holds barred ultimate cage fight! To the death obviously.
Sounds good to me!
If it is just a boring climb off, I say we have a set route (natural or plastic, I don't care), it has to be within their ability, so no harder than 26

. Then we strap weights to them (as a % of their body mass, so it's fair) and up the weights until someone fails miserably. Then in keeping with the death-match theme I would suggest that the winner gets to drop his competitors weights onto his subordinates heads (from a prescribed height). It will be a lot like the scene from Lord of the Flies (I think).