Actually, you win AV easy as Horde by bum rushing this spot:

Then, you make sure absolutely no Alliance get past that choke, and you win.
The first step to this is to send about 15 people to hide behind Galv's bunker. Once the Alliance engage Galv, wipe them out, then head for the choke. The rest of the team makes sure to cap everything and prevent any enemy caps (specifically SH GY).
At that point, you can kill Bal and wipe out the south towers easily. You also need a 5 man gank squad to patrol south of the choke to kill any Alliance who slip past your defenses.