The rotation decided by the order the members posted would be fine. Perhaps a structure like this would work: First map descending order, second map ascending order, third map alphabetical order.
I say the first map should be a basic 4v4 map, medium sized, and a theme that we should all agree on.
I think there should also be a 'turn timer' meaning forgers have 24 hours to complete their turn, or the next member goes. If a member misses so many consecutive turns (maybe 10), their spot becomes available to other participants.
I say we do it hovering over the ocean. It's the first one and if it stays out in the open it'll make it easier to keep track of pieces.
Can't wait to get this started!