I'm a lvl 50 zerker with mostly crafted equipment and adept 1 skills. Yesterday I attacked one of them dragon-thingys in Everfrost and they're lvl 42 ^^^. In
def stance it took me ~3 minutes to kill it

I didn't lose any health so I might have been able to go into off. stance, but it would still take ages to solo-grind exp by killing ^^^ I think.