Since you guys are not practicing for LE I would 86 the shoot don't shoot scenarios. I would instead set up some force on force drill based on actual dangers you guys may face while out on the street as a civilian.
Back in my retarded days (sadly not to long ago), we use to use unloaded guns (please don't do this we were very stupid and violated many gun safety rules) to play out scenarios. Of course using our system we had to assume that a trigger pull in the direction of the bad guy/good guy was an automatic hit. We know how wrong this is right. Anyway you have a much better training opportunity using airsoft. Best would be simunitions.
If you need help with scenarios TFL members will be a ton of help.