Join Date: Jan 2012
Location: Not every shadow, but any shadow
I dunno mate I don't see you have any option other than to go with some IA Eldar Nightwing or ally up with some Dark Eldar for Razorwings and Void Bombers or even Space marines for their Storm Talon or Giard for some Valkyries.
Even then you're going to be heavily out numbered but you might win through as his flyers are trying to transport troops about where as you guys will be totally focussed on Air to Air.
The Quad gun is a good weapon for sure but at the end of the day it is only one and a basically defensive emplacement. Air superiority will only be gained by meeting them in the sky.