AI, economy, unit size and missile attack questions

[Primative1]

You don't have either option as Armenia. The army you start with is small and of poor quality, save for your generals guards. The only cities you can blitz with that are 2 or 3 rebel cities around you. Try blitzing Seleukid lands with it and, when they're done laughing in your face, they'll wipe the floor with you.

You can't disband and build up because the Seleukids are coming for you right from turn 1.

You have a third choice apparently.;

You get screwed.