I pretty much camped with it, spammed flags until I got hit markers and kept spamming. The AA missiles were a huge help, I think they accounted for seven of my ten, but I got all ten in about three games. I'm not sure if it was luck or a good tactic but that small tank graveyard on Armoured Shield helped quite a lot, I parked up there to camp for a while and no one bothered me. I wasn't sure if that's because there's pretty much no cover in the area around it or because I blended in with the dead tanks, but the latter was my intention!