Ran it 3 times with all our characters last night, and our groups record was 8mins for the nightfall and 7mins for the weekly, without running past any of the groups of mobs (except right at the very beginning to get to the servitors). 12k crits with icebreaker on nexus boss! Anyone that needs help with it this week that is on ps4 just give me a shout. Must be the easiest nightfall ever.