knight vs berzerker?
Zerker. Learn to evade/blind/block
https://forum-en.gw2archive.eu/forum/game/dungeons/Naked-Arah-P3-solo-no-armor
The more experienced you are, the better Berserker gear is.
Survivability from stats (Vitality, Toughness) is meaningless in PvE. Aegis , Blind, Protection, Weakness, Dodge and Block are your avoidance and mitigation tools.
This goes for all classes. It might seem tough at the beginning but once you figure out just how simple and predictable PvE is, it won’t be a problem. It helps having a competent group that stacks and supports each other.
If Thieves can survive in melee with medium armor and barely half your hit-points, so can you.