Just played a short Lusetanni campaign, and that was quite fun. Managed to take 5 settlements with my starting armies, but was 100 000 in debt...
It was only after I had 6 towns that I even started turning a profit.

The Lusetann light cavalry (the ones with face-masks) are amazing. They seem pretty light for a bodyguard, but they more than make up for it with the fact that they hav AP secondary weapons, and do about 15 damage. I managed to slaughter Carthie sacred band cavalry with them who have far higher defence, simply because I did so much more damage than them.