I am currently in my first armenian campaign and let me just say this has been the strongest faction yet. All my armies are composed exclusively of CA. They are amazing, one of the best units in the game. 10 units of CA defeat 3-4 full roman stacks of Urban cohorts/cav and aux archers. I see no need for regular cats as armenia as your CA can more than do the job. The only real threat is the enemy's heavy cavalry and even that can be easily destroyed with some micro management with just one unit of CA vs the enemy's heavy cav, just have your CA on skirmish till they get to the edge of the map, by then the enemy has suffered some significant losses from your arrows and is tired, then just turn the skirmish mode off and charge... the enemy will rout on impact 99% of the times. I am now used to battles where the enemy loses 2-3k while my losses are in the single digits. I thought the Seleucids were strong, but.. wow armenia rocks.