It's my understanding that there is specific pathing for the divebombs and the position of where the marked person is when the mark disappears is what causes the pathing. In saying that, the pathing is all over the place so the easiest method is to bait Twin to a specific known path. This is why everyone stacks in that one corner and moves forward a bit and back in because 100% of the time, Twintania will divebomb from SW to NE and if everyone moves SE (out of the corner), then the team is safe. There might be other safe spots but this strategy works 100% of the time if A) everyone stacks in the corner together and B) if everyone moves out at the same time when the marker disappears/Twin appears as a focus target.