Offensive Guardian damage?
In a full zerk set up, getting 6-8k crit is normal on solo play, at least with my old build. By the way, you cannot get 250% crit damage. I have no idea how you get the number, but at most you can get like 100-110% crit damage (without counting the 50% base). For my highest burst ever, it’s 23k (granted that I have few might stacks plus the boss has 21 vulnerabilities).
He might’ve meant 250% dmg on crit (150% base crit, +100%, I get confused sometimes what exactly is meant too)
Fishsticks