When an Optional Event occurs, don't you wish you could just scream out to the zone "HEY, a Devil Walker is spawning in XXX, get over here now!!" Yesterday there were just 2 of us fighting, you guessed it, a Devil Walker Event we got it to around 2% before the timer ended and in the distance I can see 3-4 other nameplates in enclosed areas nearby, but had no way of communicating to give them a heads up. Even if I were to go to them, I couldn't talk to them without being in their Fireteam, if it's already full then you can't communicate with them at all.