I find that when you get 4 people who know whats goin' on together for an APC rush, it works pretty much 99.9\% of the time. 3 rush in to blow the building, 1 Hotwire/Tech plants thier bombs, the other 2 gaurd the inside, the 4rth stays in the APC for transport to another building after the one your at is toast(of course killing off engineers coming to make repairs as well). Unless the enemy gets it together, you can take out 3 buildings without commiting suicide.Of course if there are more than 2 tanks in the base, its best to rush 3 buildings at once, as the APC generally won't last in such an unhealthy enviroment to fend off repair crews trying to get at the building.