Ok, so this guy attacked me again, but this time he used 30 bouncers which took approx. 7.36k weapons from me, I decided to upgrade my storage so this doesn't happen again.
I'm also thinking of building an army up to take on this guy, or at least make him loose a few troops if he attacks me. We'll see how things go in the game, but hopefully in a week I will be in a much better position!