Finished the bastard off. The difference between this being a piss easy fight and a totally stressful, annoying piece of shit is drinking that potion (since you get 1-2 shot without it), having 3 bars of vigor (so you can spam Quen/Trap), and playing on the PC version (since you cant look up on 360).
Turned off difficult QTE's too. QTE's are retarded enough, but having a tiny prompt on a huge screen which lasts for only a second or two is just batshit retarded.