It's a good idea in theory, but given the SE overworld servers seem to be run on paper maché I don't see it working out. I reckon ideas like this would just cause the servers to die. See: Ixion FATE. Even now it's still 90k'ing people. The servers don't seem to be up to the task of handling the overworld stuff and unfortunately I don't think the human version of the 2nd boss of Aurum Vale will allow the servers to be upgraded to handle this.