Chris, I think if the understanding of what randori is, a two person representation of an encounter that allows us to train relatively realistic exchanges that are like a laboratory for experimentation... then we can construct almost any kind of scenario that is workable. In my experience working with police and security training the trainees pick up lots of practical "what if" experience. As they get more experience you up the speed an then add two on one, etc. I should add that with the less experienced groups there should be very close supervision because folks tend to get carried away.
For your input. It was very informative. I have also reformulated my query in a non-aikido portion of the Aikiweb.