A small tip: by the time Bahamut's dive mark disappears, the targets/damage has already been determined, so as people are spreading out a couple of people can actually run into Bahamut's dive path and not get hit; it's literally just animations at that point. Other than that, your members need to be self-aware of their positions and those around them. If someone is being sandwiched between two other people, one of those two should give the middle player more room.