First of all, TAKE ALESIA!!! It will severly hurt Gaul which will make it easier to kill them. Then take the Briton foothold.( I'm playing medium/medium, and after I took the city, Briton hasn't bothered me since) Your main priority is GAUL or DACIA. They will be relentless. Gaul will keep coming at you after you take Alesia. Keep a family member there. He will quickly become the greatest general of them all. Your real first priority is to take a more 'civilized' city for you to make your more advanced units. It will also give you high amounts of money for exterminating the populace.(Exterminated Massilla and got 6,00 Denariis) The Germans have the best Barbarian calvary unit in my opinion which is, you should know this, Gothic Calvary. As Germania, get Beserkers and night raiders as fast as you can. They will be useful in the dense forests of your homeland. Well, I'll post more later if I get a chance.