Lmg and malfeasance.

Divinity and precision weapons. Don't bother using supers that aren't Bubble, Well, and Tether as every super deals 90% less damage to the point a falling star Tcrash can't out damage a single shot from a linear.

when entering the final room, have the strongest most unkillable guardian in your fireteam learn the rat maze and take out the minotaurs. the other two people can clear a few enemies in the entry hallway and wait. have a well or a bubble, and div, use precision weapons and double special. an example would be thunderlord and two snipers, or retrofit lmg with eriana vow and a sniper or a chillclip fusion rifle could come in handy too. one person with chillclip is all that is needed to get some additional shatter dmg if needed. The reason you want to dps from the entry hallway is it is relatively clear from enemies, and if the boss pushes up on you, simply back up beside the walls with the hole that you can crouch under, and the boss will decide not to push up on you. so it creates a special place in the area where you can have constant uninterrupted dps, and it can begin as soon as the three buffs are collected and before the 1 fireteam member returns to the location.

High damage supers, divinity, and thunderlord worked for my group. Still had 3 minutes left.

I got it using... 1. Well 2. Divinity 3. Machine Gun 4. ??? 5. Profit!

• Above all else, keep deaths to an absolute minimum. If you die you’ll lose the damage buff for the remainder of that damage phase, so it is always better to retreat and allow yourself to heal for six to ten seconds than to be entirely ineffectual for perhaps an entire minute. • Having someone run a Healing focused Well-lock or an Overshield/Bubble build to improve the party’s survivability and therefore keep DPS consistent is a good idea. • Use heavies that deal good precision damage as Tormentors are resistant to non-precision damage. Thunderlord has the additionally benefit of potentially throwing the Tormentor off balance, reducing it’s ability to stomp/grab you. • Having a player on Divinity to enlarge the crit spot will help keep the party’s DPS consistent with the Tormentor running around, but it isn’t strictly a necessity. • Between damage phases split up and look for the Minotaurs before the indicators pop up. The chances that one or two group members will find their Minotaur before the indicators pop up means there is a good chance you will end up saving time in this fashion. • After you take out the Midboss, make sure everyone gets a chance to use the Rally Flag before moving on. (΄◉◞౪◟◉｀)

Div and Thunderlord plus Arc supers. Happy to help you if you get stuck. Helped ~20 people through it so far.