is there a kind of consencus for when we can use the proxy directly in the mediator or not. s there a kind of consencus for when we can use the proxy directly in the mediator or not.
Yes, you can. The view has no other purpose in life but to expose the data model to the user and allow them to view, navigate and update it. Therefore it is a given that the View tier will have relationships with the Model tier whereby it has implicit knowledge of its actors. The Mediator may certainly have references to the Proxies needed to feed its view component. Using circuitous paths such as notification/command/proxy/delegate/notification/mediator to get a mediator the requested data rarely gains you anything valuable; instead it adds complexity that is difficult to follow later, particularly if you didn't write it.
Multi instance of proxy and mediator ?
I have difficulty actually understanding your elaboration, but from the question quoted above, I will venture you might be wondering how to have multiple instances of a given Mediator or Proxy. You do that by registering the actor with a unique name, not just the NAME constant, but usually the value of the constant with an ID appended to it that is tied to the data object or view component it tends.
HTH,
-=Cliff>