If you have created a set of pre-made soldier types (ie. Terrorist fighter, terrorist AT, terrorist sniper) in arsenal, you are unable to directly place them down within the Zeus editor.

The only known work around is to place down units as normal, then individually go into each soldier with the arsenal module and "load" in the pre-made soldier. This is time consuming and slow.

On a similar note, once you have made your set of pre-made soldiers, you are then unable to copy/paste them as doing this reverts them back to whatever they were placed as. So even after you have made an insurgent fireteam, you cannot quickly paste them all over the map for an easy made mission.