That could have worked, but I'm aiming for an Armenian cultural influence to be projected into the rest of the Caucasus. Basically what I'm looking for is the possibility of Armenia playing the role of Greece, Persia or China, civilizing any nomadic invaders who invaded them. Vaspurakan was seen as the cradle of Armenian civilization, so how can Greater Armenia endure for a very long time? Granted that they became the very first nation in the entire world to adopt Christianity as the official religion, could other nations be Christianized by Armenians?
Oh, when you mentioned nerfing the Roman Republic, I had in mind a Roman Republic that splits into three independent 'kingdoms', one that is controlled by Marc Antony and Cleopatra, another state controlled by either Octavian or the Republic itself, and a state controlled by Agrippa. Are these possible too?