in 0.8x
never played:
Sarmatians
Hayasdan
Arche Seleukeia
Baktria
Getai
Pahlava
Ptolemaioi
Romani
Sabae
Saka

played a little:
Casse
KH
Pontos
Sweboz

played a lot:
Aedui
Arverni
Karthadastim
Epeiros
Makedonia
Lusotannan