Ooo ooo! that fan one gave me an idea.
I present the "TRI-Flyer" or "The flea" for the individual ones.
On on their own they can climb terrain and they hop to move around, but cant fly, but when three join together they can fly and move quicker and pick up other units! but they cant attack, unless you keep them a "flea" and change out their adapter for a weapon? alternatively it could be a faster scout.. you could disconnect them with a "flea" button and they'd pop apart mid air. giving them a better chance to partially survive in a bad situation.
Triflier.jpg