In my next game (and the last battle of the year 2020), I had a great pleasure to play against Dean (frequent organizer of various MeG events and a highly dependable provider of all things necessary for games via his fantastic Olympian Games shop). He was kind enough to bring the army of Armenian so that I had a rather rare opportunity to play against historical opponent.
What is even more interesting was the army composition itself. In addition to expected Cataphracts and Horse Archers, there was also contingent of infantry, mainly Phalangites and Roman style armed soldiers. That together created a very diverse and flexible force and here are the details of the army's composition:
Armenian (Tigranes) - Army List