What "migrated faction" options are there?

[burn_again]

Yeah, I could rely on mercenarys, but I normally try to use barbarian units only in barbarian campaigns. Well, Galatia might be an exception since it's not as unrealistic as greek armies in Gaul.

I did use move_character and auto_win to get to Ankyra, and add_money + process_cq to build it up. I used the Arverni because most celtic territories in Europe will revolt to the Aedui and I didn't wanna get involved in European wars. Also I did not let my starting cities rebel, but gave them to the Aedui, to avoid a gap of power in Gaul. The AI-Aedui usually get destroyed early on anyway, so I thought they could need some help.
When using then Arverni I edited the Campaign_script.txt, so that I could get a lvl2 gov in Ankyra. In 1.1 you also would have to make Gaesatae recruitable there again.