You don't have to worry about the Seleucids fielding archers. They have a horrid range. Horrid horrid horrid.
I am playing a Seleucid campaign now and my archers suck big ones. They are easily outranged by archer auxilia and most other archer units I come up against. Horrid it is I tell you! The only saving grace is being able to hire Cretian archers!
But I do agree with Fridge. The Seleucids have a great balance of units.

Can anyone tell me where the archers ranges are located in the data folder?
I know it was mentioned somewhere but I can't find the thread.