Therefore, I support the system initially proposed by the organizer.
This very initial system has one significant drawback – it has an even number of games (4), which means there is a possibility of a draw. And then, we got Garuna against Helmar for the first game. There's no point in even playing; it's clear from the start. And then another mirror match, again, it's clear... this isn't quite right.
But if we still stick to this option, let's start with 2 random matches, then mirror matches based on those, and in case of a draw, we play a fifth game. Either by cards or again, randomly.