To your very positive surprise, all three of them are different from the two you already have. This makes five runes. You really struck a gold mine with this team. You consider what to do with your defeated opponents. If you tie them up securely, they won't be able to escape unless they have a hidden trick that you don't know about. That means that either the examiners will fail and collect them if losing your starting runes results in disqualification, or they will die; be it from dehydration or any of the roaming animals.
You could bind them loosely, so that you have plenty of time to make sure they don't follow you by the time they get free. Of course, that would still leave them open to death by wildlife, but why should be your problem.
You could, of course, kill them yourself. The examiner did suggest against it, but you can't be entirely sure that these guys won't be back to bother you later, and this is the only way to make sure that a team that knows you are in possession of at least five runes won't cause further problems.
Regarding the defeated team, you …
[] Do nothing.
[] Tie them up securely.
[] Tie them up in such a way that they could potentially break the bonds given a few hours.
[] Kill them.
[] Write-In
Your teammates hardly seem to care what happens to the enemy team, being far too distracted to do anything but execute your quick commands.