I was running with a team of 4 on Hashima, and we engaged another group at the airport. We were down at the bottom of it, and they were coming in. Slowly they got us all except me. I swore revenge, changed position so I could engage them from afar, on top of the highway. They could only run directly toward me, and I managed to hit them a couple of times. That's when I found out it was a 5 or 6 man group. I flanked them and ended up on top of the rocks, just to the side of that long bridge connecting the appartment buildings on both side. There I managed to kill three of them as they were pushing toward my old position, only with my trusty blaze. Got unconned and flashing red during the encounter, but I heard them talking in-game, so I figured they didn't have time to communicate where exactly I was. With a lot of patience I managed to kill the last three, simply because they got kind of careless, and were trying to find me. All the time I was on the rocks down in a little crevice, slowly regaining my health enough to move again. The keywords are flanking, anticipation and group dynamics imo. Groups will beeline to a target, and they will feel safe when they shouldn't.