I beat it with Kael, Shaman, Jizoh, Fenax

First  off-  this  is  Nightmare,  not  Normal  and

Second  off-  Why  do  you  go  to  the  back  of  the  Forum  to  answer  threads  that  they  probably  don't  even  need  help  with  anymore  from  over  2  years  ago?

Your  such  a  Pal  helping  people from  2  years  ago.

I'm  give  you  an  upvote.

You  beat  it  with  Jizoh.

You  Stud!

I  always  knew Jizoh  was  a  Beast.

Jizoh was a beast????? I heard people say he was junk....

He was being sarcastic and fatious. 

oh

not sure what the difficulty here is, but I used my current set of food items that I have for leveling with my farmer, pretty much just champs I picked at random

I assume this is brutal mode.

My so-called team is all of 37k power. Led by Athel (L50), Frozen Banshee (L25), Hospitaller (L26), and Alure (L27). Only Athel has full books and masteries except for top level.  Athel, FB, and Alure use Lifesteal and Perception artifacts, H is totally bare bones.

All die except Athel, but it did not seem to be the goal to 3* it, just beat it.

Edited.

I  think  it  was  Nightmare  difficulty.  That  boss  is  one  of  the  hardest  bosses  to  3  star,  and  Brutal  is  never  a  problem.  Hopefully,  they  are  still  not  stuck  on  it  after  2+  years  :).