So instead of focusing on defense and war, this time around as the WRE, i used diplomacy and gold as my weapons. Here's some screenshots of my progress so far.
As you can see, I have 4 extra allies as well as the ERE. Alamans, Suebians, Maurians and Macromans are all Military allies. I had the Quadians as a puppet state but the Ostrogoths destroyed them and then Macromans took that from the Ostrogoths. I've only lost 2 settlements so far, one to the Ostrogoths and i can't remember if they took another or if my gifting of Vesontio to the Suebians counts as losing one but either way, turn 7 and only 2 settlements lost.
The Saxons are gone, Caledonians are about to be destroyed. Illyria and the Ostrogoths both only have 1 army each. The Jutes are under attack by Angles and Franks. Alans are at war with me because i attacked the Vandals as they were raiding my northern lands. Doing so also made some of the barbarians like me more since they had no love for the Vandals either.
The ERE is doing good too, Huns have barely touched them and the Visigoths are fighting a losing war with their Dacian allies. Once i've taken out the Celts and dealt with the Ostrogoths, Illyria and my allies/friends have dealt with the Jutes, i will be free to turtle for a while and build up my empire economically while my barbarian friends and allies keep my borders safe for me, once i am ready i plan on uniting the Roman Empire as one again when i turn on the ERE, then i may also pay some homage to Alexander and conquer the middle east, destroying the Persians and their puppets
By the time Attila comes of age, he will have to deal with a unified Roman Empire that is bigger and better than the old one, as well as all of the barbarians guarding the borders of their powerful friendly neighbour.