one term like "mediation" won't cut it.

Whilst this is correct, Jack, it does cover all of the usages in Harker. What would probably be a more useful idea is if we had separate threads on the different types of mediation. We are jumping about from one to another on this thread and the previous one, at cross purposes, and causing confusion. At least I would suggest we need to be clear about which mediators and what type we are discussing. Even just one mediator like Sharp can be said to have mediated in several different ways.