The mission tells me what Deployment cards to use for my Initial Group and my Reserve Group. Then I secretly choose my Open Group Deployment cards.
I'm not allowed to choose the same Deployment cards previously selected by the mission? For example, if a regular Stormtrooper is in the Initial Group, then I can't pick a second regular Stormtrooper group for my Open.Group.
If I had a regular Stormtrooper group in the Initial Group, could I choose the Elite Stormtroopers for my Open Group?