I dont believe that to be true.
When ET was made, the devs designed it in a way where, it was difficult, but not impossible. It required a strategy. And you did not need the 79 armor in order to do it. 75 and 72 were perfectly fine. As well as the 79 was not that much of a buff on the previous sets. If anything, the damage was less. The weapons were impressive, but again, you did not need them to complete the dungeon.
Also, it was a fun dungeon, that had interesting challenges. Each boss had its specific gimmicks.
Darkest set is 3 to 4 times stronger than MG sets. And on top of that, Helium based the difficulty off of players who have Darkest set, NOT MG set.
Sure, when you have 70k hp and 30k heals, a boss that hits for 30k is not a problem.
But when you are using MG set, you have 30-40k HP and 10-11k heals. That is an instant wipe out.
On top of that, the boss has 3 different stun, fear, hush, sleep, root, lith, 4 dots, soccer kick, and absurd amount of HP.
There is no strategy for this. This is just shoving everything into a boss and saying "oh look i made him hard!" No, you made it silly.
If this boss had an interesting rotation that needed proper timing, or have to kill mobs that try to heal him, or avoid his aoe that can instant kill, yes that would be a hard but fun boss.
This, this is just pointless.