i think - so far - a smaller team is even better, cause when you are down to one deck, one player is using the deck, then another, etc., round after round, but then master-percentage is higher.
btw, i think raindbows should have 24 novas (that is 6 per player, like every other cards, why the additional 6?)
i only thought a short time about it by now, but i think it is maybe better to form 2 really good decks and 2 "sheeps", then the 4 teammates share them and win more often, than 4 normal-good decks and, only if only one loses first round, they lost "important" cards and it really hurts.
im really convinced, that this event with this rules will be pure chaos (much more than usa vs row), and it will end with lots of forfeited rounds, dropped out players and a few disappointed, motivated participates.