In compiling enemies I noticed two potential missing army lists. Basques (who were the only enemies I could find for a Gallic Aquitania army), and Armoricans (pre-Breton).
The Basques would be an early Early Navarrese list.
The Armoricans would be a later Later Foederate Roman style list.
As far as I am aware, not a lot of source material for either.
I suspect neither would be world beating lists...
Richard