Let's organize a tournament.

I'm not a big fan of playing with just one faction. However, if it were a team tournament with random factions and a similar format: first, captains are chosen (preferably mid-level players), then they draft players in turn, and after that, we play with that setup: the first player on each team plays the first player on the opposing team, and so on, for 5-6 rounds – that would be a good idea.