BTW in my humble opinion, this event will be very unlikely to run smoothly and by the numbers, given that this is a minievent, and you want to allow 1 or maximum 2 days for a round. Now, 1-2 days is hard enough t shcedule a duel and play it, not to mention that we will also have to arrange times with our teammates to work on decks, especially if you intend to randomize the teams evey round.
I hope that things will run smootly, but if not, I fear that players will stick to individual deckbuilding, thus, negating one aspect of the event.
Did you think about this problem? If yes, then do you have a solution? I guess that simply posting the teams 24hrs pre-round won't cut it this time.