I don't have a mic and have completed several raids with people dying only at the hardest parts (against Atheon for example) and most of those were just unexpected deaths (like not knowing they were targeted by supplicants or Atheon himself. Some did just back off the edge accidentally though). Most of those times things went swimming though. Made it through the labyrinth in less than 5 minutes in some of these and destroyed the Templar without ease. I would like to add in most of these cases there were maybe 2-4 people with mics.