I should've waited until Crota to do this. Only 5/6 of the crew got that achievement on our initial run. I remember the pre-Atheon jumping puzzle was the bane of us. So, we had the party leader be ready with their finger on the trigger, ready to kick each person as they jumped across. Our 5th guy missed the ledge. I remember sitting at the door hearing his last words: "Noooooo, kick me, KICK ME!" We did manage to kick him before he actually hit the death barrier and managed to 5-man the rest.