1. Makedonia
2. Atropatene
3. Koinon Hellenon
4. KH shadow faction
5. Kyrenaica
6. Pergamon
7.Pontus
8. Hai
9. Ptolomaioi
10. Selukidai
11. Pahalava
12. Boshphorian kingdom
13. Baktria
14. Saka
15. Mayuran empire
16. Indo greeks
17. Galatians
18. Saba
19. Romans (ermergent 220-170bc)
20. Yeuhzi (emergent whenever)
sounds cool, though I wonder what about the Getai, Tamil, Nepalese, Wusun, Xionghu as an invading group to drive the Wusun around, what about Meroe and/or Ethiopia?

I definitely see a Euro/Mid-east preferrence in terms of faction roster... but we cannot totally ignore the others. Didn't the Dravidians of S. India and Sri Lanka resist the Mauryans during the Kalinga campaign and were known to hav some of the best war elephants? The Nepalese were fierce and known to be a very tenacious nation. The Getic tribes and Thracians were feared by Greeks due to their tenacity... Wusun might seem redundant, but remember they (liek the Sauromatae in EB) have no perks allowing for settlement, the Saka have Indo-Saka reforms, and the Pahlava have theirs... but not the Wusun - who are also a more oriental seeming faction..

just some thoughts... being too Euro/Mideast-centric can be a bad thing