I fly buffs a fair amount and think the best thing to do is come from dead 6...level...pull up to about 400 off his 6 .... don't fire, as it will only serve to let him know your there, I'm sure he wont be looking around in the outside view, and didn't see you coming from 8k away. when the buff fires at you.....just stay level, or zig zag abit while spraying all over the sky..... Theres no sense in trying to rtb with a pilot wound or half a wing or whatever severe damage you have by now, so just bail out....rinse and repeat.