Let Arcaea kill Arcachon. Have all the Arcachonian nobles join Toupellon. Start a resurgence of Adgharhinism in Toupellon to combat the Sartanians. Start all kinds of religious havoc. Depose the Sartanian king via rebellion, elect your own Adgharhinist king, and declare war.
AKA "The Ohnar West Strategy". Look how that worked out.....
