Casse: Celtic slingers is all you need at the beginning
Gauls: Escape to Briton to get away from Romans
Baktria: Get Kophen and blitz the small settlement on the north east.
Getai: Conquer settlement with your starting force. When Makedon gets weak go for Pella
Pontus: You could try runaway to Cremia. Or just get the settlement on the north east.
Carthys and Romans: Just beat everyone you meet
Epeiros: Blitz Pella
Makedon: Take out the lousy Koinons early. Then go after Epeirus
Koinon: Transport your army in Sparta and combine it with Athenian one
Lusotanna: Take out Carthage early. Makes your life much easier


Thats my strategy. Sorry its not that great