First, noah, that idea sounds great! I would definitely prefer the wingmen to be in a circle, but if it wasn't possible, I would go with the alternative.
Also, AllanR, your solution is also something I wanted to add (if I am reading this right). If the wingman is on the left side of the ship, then tween only to another point on the left side. If it is in a corner, pick the sides it is on. This keeps the wingmen from traveling across the center in an x shaped pattern.
Furthermore, the project you posted I am unable to run. Construct crashes every time I try to run it (is it possible it is because the project was made in a beta version?)