-If you take Rhodos, it might help the KH since they won't have useless stacks idling around there anymore, draining their treasury.
-Macedon might become a powerhouse if they manage to win from the KH, especially since they only have the Getai as opponents in the Balkan, so try to check their power.
-Pontos and the Seleucids may ally against you, so try stirring a war between them.
-Unless the Ptolemaioi are winning against the Seleucids, you could risk taking Cyprus from them, or even parts of southern Anatolia.