my revisions of AS and epeiros, possibly not correct.
Epeiros:

Keltohellenikoi Hoplitai - Factional
Taxeis Triballoi - Factional
Hoplitai - Factional
Elephantes Indikoi - Mercenary
Pezoi Brettioi - merc - i dont recall that epeiros was ever allied with the brettioi in fact i recall that the tarantinioi called in epeiros to help fight against them
Hastati Samnitici - merc - same as above
Samnitici Milites - merc - ""
Thraikioi Prodromoi - merc - i just plain disagree, i dont think epeiros owned thracian lands
Thraikioi Hippeis - merc ""
Thraikioi Peltastai - merc - ""
Hippeis Thessalikoi - Mercenary

i feel that as far as AS goes, all galatians should be mercs, IIRC galatia was a mostly autonomous region, also it was claimed by pontos aswell, also as far as gameplay goes i kind of prefer them that way for some reason
Arche Seleukeia:

Anatolikoi Phyletai - Factional
Lugoae - merc
Galatikoi Kuarothoroi - merc
Galatikoi Tindanotae - merc
Gaeroas - merc
Galatikoi Lavotuxri - merc
Galatikoi Kluddolon - merc
Keltohellenikoi Hoplitai - merc
Thraikioi Hippeis - merc - i dont think AS moved into thrace and held those lands long enough
Thraikioi Peltastai - merc
Harmata Drapanephora - Factional
Elephantes Indikoi - Mercenary
Elephantes Kataphraktoi Indikoi - Mercenary
Hippakontistai - Factional
Kôfyârên-î Verkhânâ - Factional
Shipri Tukul - Factional
Gund-î Nîzagân - Factional
Toxotai Kretikoi - merc - they were well known mercenaries

i might be wrong so just tell me if i am