Quote Originally Posted by konny
That is a complete different question, what depends on a lot of other factors that can not be generalized (financial situation, compostion of the army, the enemy, the kind of combat, most likely terrain etcpp.) I was talking of individual units.



When the fellow Celts attack you with 6 or 7 units of Gaesatae, you'll be happy when you had decided for slingers instead of archers.
I don't know, I was happy when I invaded Gaul (in my Roman campaign) with 2 armies with 4 sotaroas each instead of 2 iaosatae each, which carries more or less the same cost.

It is the cost that mainly dictates what troops you can field (out of those you have access to), so cost-efficiency is quite important IMHO.

So in many ways it makes more sense to compare 2 units of sotaroas to 1 unit of iaosatae.