Beris is so annoying, she keeps spamming pins back to back and it traps me even though it says I have the resistance buff. You literally can't do anything but struggle if you keep getting bad rolls and have to burn a bunch of energy potions until you get lucky. Beating her isn't difficult if you're on par with levels, but the fight takes forever if you get caught in a loop like this.
Tried taking advantage of her weakness to bondage play *hint hint*? Wiki states she has a -25% status resistance against restraints.
Granted, at some point she becomes unbeatable, but that's simply because of how the Labyrinth works (hellhounds becoming stronger every time the player wins, or escapes from a fight), but I can usually fend her off 3 - 4 times and I didn't get too crazy with level farming.