I'm very new here and learning by reading old threads. What I don't understand in this one is:
You can't jump to a device, only a page, except from the Devices system page, but you can link to a device in order to execute its action list. Wouldn't this work here? Couldn't you simply put Device2's actions in the normal way in its Device Properties and a link to Device2 in Device1's Device Properties, following its own actions. Or vice versa (but not both or you'd create a loop).