Celtic archers??

[The Celtic Viking]

The archers are slightly better in melee, but who uses missile troops in melee anyway...

Who uses missile troops in melee? I do! Bugimannoz make fine flankers when their ammo is spent.

As for sotaroas, I still think they have a use (although not a huge one). Flaming arrows can be good to have when defending in a siege, to destroy the enemy siege machines. Pretty much like the Greeks toxotai.