Just stumbled across this on YouTube:

What makes this so amazing to me is that they don't cheese or cheat their way through any of the encounters. The only place where they kind of "cheat" is during the 1st and 3rd encounters, one member of the fireteam manages to get out of the area and begin making their way towards the next area, so that by the time the rest of the team finishes the active encounter, they can all get pulled ahead to the next arena (cutting out loads of travel time). But this is impressive in itself, because it means the team is essentially 5-manning the 1st and 3rd encounters, and doing so in record time. It's a fun watch :)