Why RedWarrior0?
Because it greatly simplifies getting rid of the Cabal. By doing this, we can reduce the combat and all its randomness to a simple lynch.
If we throw two suspected Cabal into the ring, we have to wonder whether or not both of them are actually Cabal, and we have to argue about whether or not we want to assist anybody and who we want to throw our assists behind. Suppose that one of them is Tower and the other Cabal; if we do nothing like we've been doing, then the Cabal's inherent bonuses will probably make them win the duel, and we're in a worse position then when we started.
If we throw somebody we think is Tower and somebody we think is Cabal into the ring, then there's no fuss about who we should or should not assist. We'll assist the Tower wizard, the wizard we think is Cabal will be eliminated, and because we're all stacking our assists on one side, the Cabal can't pull any funny business like they did with the last duel.
This way, we don't wonder why our Tower pick won the match; he won because of all the assists, not because of luck or a Cabal boost. We can then return to regular scumhunting instead of pondering why somebody narrowly won a match when they used the wrong element, won speed tossups, etc. etc. etc.
RedWarrior0 is voting for both the claimed investigators. That's a pretty Tower looking move, like I explained before, and there's certainly a bandwagon forming up against him, which makes me believe that the scum are in on the bandwagon on him. This, to me, makes me think that he's Tower, more than anybody else in this game right now, so he'd be an excellent choice to be our executioner.