I was reading about a post on the general forum when I thought up a tactit fro nod to get people from the tunnel to the PP in under. Have like APC's and maybe buggies distract the AGT while you get like techs and maybe stealth back hand to get behind the PP and destroy it.Dunno if it's been mentions before, but distraction is good tactic on several maps, including hourglass since most people see 1 tank and for some reason they ALL have to go after it. (well, not all the time)
Also, try not to have everyone go after 1 tank, just get enough that will beable to kill it without any problems.