If you go left side in the boss room with a good enough healer one person can sit on the bridge and the others near the bridge, this was done with assault on though so take advantage while you can
Our healer was wasting all his charges on the other 2 people so I was going down constantly because I was pulling way more aggro, the worst part about it was they pushed too far up in the garage and we almost wiped because the healer got rushed
The first ss uses only 24 stacks and hits for over 1m per bullet on the low end with first bloom slightly less with a frenzy lmg but still viable for consistency
The second ss is a build that hits for 1.1m with turmoil for splitting damage to clear faster it hits for over 2m normally just run contractor gloves or foxes prayers
The third ss is a healing build with hana-u over a alps piece because the extra healing isn't needed with proto it has 1 paradox for the slight chance of chem coming back for more maintained healing
All of these are viable at high escalation tiers I have tested them and hit extremely consistent numbers on the dps the healing is enough to keep my teammates alive consistently unless they are killed in one bullet usually