It that was Esh balance is wack.

Do I need to say more then:

Deals 9253 to 17184 Lightning Damage
30% of Lightning Damage Converted to Chaos Damage

Died on a jugg that had 85% lightning res, 29% chaos res, 10 endurance charges and 5.6k life. But I guess this was tested on a CI character.

Before going into the fight I did not even think it was chaos damage as nothing really indicates this. I don't think that bosses should have big chaos damage attacks in the first place due to CI existing. Every single league that node becomes better and better, in Poe1 and Poe2. While life builds just get weaker.

Edit: I calculated what damage range would kill me with the buffs I had up when I got hit. And this attack should not have killed me even at a max roll. Current theory is that due to using leap slam I was double hit. Or longer shot theory the elemental conversion buff is applying to the chaos damage. In both of these cases it would be possible for me to die.