Gustang, is it possible to combine this with your Russian Roulette for Two mission so that the enemies spawned are randomly generated?
Once I can straighten out the probabilities and can get a good engine up and running, I'm pretty sure it's possible.
As JoeBob suggested, my primary drive for this is to setup patrols with (seemingly) random encounters. How cool would it be to go on patrol and meet up with different things as you follow your assigned path! Some could be friendly, others not so. Some you can fight, some will make you run. Of course, when to remove said encounter (for performance sake) is another problem all together...