another suggestions:

Epeiros-as-Cilician-Pirates

Armenia-as-Hasmonean-Kingdom

Casse-as-Kingdom-of-Tylis

Saba-as-Axumite-Empire

you could try to modify all 4 factions in a single campaign because as original factions they suck and are outdated
It is a lot of work in modifying the ethnicities of Epeiros and Armenia, especially when you have to create some new ones like Kilikian, Zealot, Idumeean, Levite, Hasmoneean, Ilyrian pirate etc
But with this new factions, I thing that the campaign will be awesome.