Quote Originally Posted by NeonGod
Are not the tribes of Leinster still Goidils?
If we use O'Rahilly's Historical Model, then the Goidels did not permeate the island until around 100 BC. This view is not universally accepted but, to be honest, the iron age history of Ireland is an academic nightmare, comprising broad conjectures interspersed with myth.

Quote Originally Posted by NeonGod
Well, Europa Barbarorum has already presented the public with a hammer-wielding, armour-bashing unit, but that would be, I think, something to include if the goal was to be as detailed as possible. I'm not very knowledgeable about the Goidilic military in this period, but I'm quite confident that javelin-throwing infantry (not skirmishers )were commonplace. Of course, my pirate suggestion still stands.
You're right about the use of javelins, of course. Otherwise, I haven't completed sufficient research to begin compiling unit lists, so I can't say. If you have any more ideas, though, I'd love to hear them. Making the unit lists as original and novel as possible is a worthy pursuit.