To make it easier to expand towards Thrace and Macedon, could Bosporan Kingdom start with the "Tribus Scythii" region? It makes them better in game because if Armenia backstab you (which they did to me in turn 3) and take Tanais with their unlimited supercataphracts, then you barely have any land left. If I hadn't known they'd attack me because they did the stupid "Have a pathetically small amount of money so you'll think we like you" thing,

I would've lost the game because I had one army and it was trying to take Campus Scythii at the time
