Trial of Sekhemas - 2nd floor white mob oneshot

A white mob in the second floor of sekhemas oneshots me while overlevel. I don't remember the enemy's name but it's the vase thingy enemy and oneshots you when unleashes fire from its body. Other enemies don't make a scratch on my character, it's just this one.

"Overlevel" doesn't mean too much in PoE 2 for survivability. What's your health and fire res? Also, he takes a lot of time to set up his vase, giving you plenty of time to gtfo or stun/kill him.

Just got killed by an elite Jar too, mob was off screen, I rolled downside while I assume it was casting its shit. Got insta lock couldn't move and got killed in less than a second.

Im lvl 90 1600Hp 1600Es 87% Evasion elemental res and honour res capped obviously, trial was around 78 and the only affliction I had was 25% monster speed.

This particular Jar mob is more dangerous than anything aside from the very last boss across all trial.