So I have been after this achievement for a long time now, and I was wondering when in hell would I ever get it. I have been doing tons of runs, Vana runs included, but never lucky with any of them.
Finally today, with the Fiend stratum and FSC following, I finally hit the acheivement with 1 bar of health after the fight with vanaduke. Thank you teammates for reviving in the end of phase 5 to help me out.
P.S. - Not bragging, only expressing my impending shock in what I did. It is easy for others, but I am not nearly as good as them.
Hard mode!