CO designates a target for each flight within the mission
example:
8xP-51D's-Mission Objective, Escort B17's to target and destroy Town Ack and Town.
8xB17's-Mission Objective, Destroy All FH's, VH, and destroy town.
If all 8 B17's return to base sucessfully, a multiplier would adjust points. If Town ack is destroyed another multiplier would adjust points. and so on and so on.
So what it boils down to is selectable targets in the Mission builder to recognize and the ability for the mission builder to adjust the multipliers. Sounds like hard work.