i've been trying to do the old kalgon's keep boss at rivenspire for a while, but somehow i'm stuck with this one. it's a V3 boss and i'm V16 and i'm still unable to do it. the last time i tried i used all V14 legendary armor and weapons with all sets correctly paired, but still i always get killed at the first hit, one single hit that i can't avoid and i'm dead. is this normal? i never had this problem with any boss before.