I think Navarre and Thomond are excellent candidates for an exodus. Both nations are OPM’s on the Western edge of Europe, so there will be very little difficulty transferring the capitol to the New World and preventing Colonial Nations from rising. What’s more, they both have settler per month National Ideas so they will be colonizing very quickly. I’d say Thomond edges out Navarre, because the OPM’s surrounding it allow for rapid amounts of MP generation in the early years via humiliating rivals and Showing Strength to get you into the colonial game quickly.