Parthia has its good sides and bad sides. It has one of the worst economies in the game especially during the beginning portions. Ironic, how its starting video is talking a lot about money. However, horse archers are quite cheep and are very useful against fighting almost every single unit in the game. However, sieges are extremely difficult with their deplorable infantry. Eastern Infantry and Hillmen just aren't good enough for difficult sieges. (That's why Armenia right know is my favorite faction... :) )

I find this really amusing how we're talking about this in the Dacia guide...