From Dark and Darker Wiki
This boss has got to be the easiest boss in the game by far unlike a lot of the other bosses having weird gimicks or "advanced tech" to dodge them all you do for banshee is walk in a circle and nothing hits you if you are worried about the tp move as long as you have 3d audio you just look at where the sound came from and strafe no crouch jumps, bunny hops, spine breaking head movement is needed just over 280 ms which should be very easy to achieve ive done this boss on every class in the game barbarian is by far the fastest just cus of the dps but any class can do it even rogue and wizard might just take a bit longer