Not needed necessarily as I know working around each other's schedules can be difficult, but I always view collaboration as an excellent learning experience for writing and co-operation. 

If a collab is not your preferred tune, just be sure to check in with your wing partner so the two of you know the order you guys plan on writing in, or details the other should know. 

Echo wing has it a bit easier - since there's so many of them - they don't need to be super in sync either, as they're just chilling so it'd be similar to standard group posting.

Oh, also everyone add "(Alphanumeric) Wing" and the (hr) line seperator to the tops of their posts for easier identification