Well, it's not, this isn't that game, the best thing to kill air is air. A key problem G2A has that you pointed out is it's limited window of time to deal damage, air doesn't have that problem. Ground can't chase air to secure a kill, air doesn't have that problem. I'd love for there to be AA powerful enough that I'd have to rely on ground forces to take it out before I flew in, but that requires more realism than most people want in this game. I want shoulder fired, nanite-based, missiles that can 1-shot ESF, but that requires realistic missile behavior and logistics that PS2 kids don't want. It would require basically a new game for air not to be the best air-killer and still have balance, maybe in PS3, but it won't happen here.