Hmm, it seems that MOAR has certainly made things tougher, it look like it may not be enough, and I don't think more "MOAR" is the way to go (though a little bit MOAR may be good, especially for the other ways the AI can attack, like CPAs and exo-wave)
Maybe it is time to dig through mantis and start implementing some of those fancy new "smart" behaviors for the AI that have been proposed over the last year or so?
EDIT: Oh, and congrats on the win! Taking on 10/10 without excessive cheese is by no means an easy feat (maybe not as hard as it should of been, but still not a walk in the park)