The first I call the "Cluster"
Basically all the soldiers use the shield abillity on the same hostage forming a huge cluster around the hostage and moving about the map as a huge blob.
The second I call the "Flying V"
Exactally like the Mighty Ducks movie. 1 soldier on each shoulder of the hostage and another soldier on the shoulders of the first soldiers forming a V shape.
The third I call the "Rescue Snake"
One soldier attaches to the hostage and another soldier attaches to that soldier and so forth forming a conga line.
I doubt you will be able to have multiple shields to one person and I also doubt you can shield a person who is shielding someone else but still would be hillarious to see the enemy team make off with in hostage in a huge conga line.