hope it's ok to post in this thread even though it's pretty old...it keeps coming up when you google different variations of "Help Kikimore Queen is kicking my arse"!
I died SO many times. Eventually I got through the main bit by just Aarding the second lot of support beams in the corridor so that I was by the corpse (good loot!) stayed there and used group silver to kill a whole lot of kikimore workers, making sure not to cross the threshold into the main room. Then I saved, then spent many reloads running into the main cave, jumping over the little spidery fiends and hugging the right wall until reaching the corridor, going in, turning around and Aarding the supports by the corridor entrance (making sure not to get too close) and then getting to the far end of the corridor and saving again.
This is where I had the same bug that has been mentioned here, where regardless of where Geralt was standing, he died. He would talk about how the he should probably gut the Kikimore Queen, and then promptly die...out of sympathy, maybe
after many reloads, I ended up just running at the Kikimore Queen as the ceiling was collapsing and casting Aard at her out of spite
and somehow, it actually WORKED! Finally made it out. So if anyone else has this problem of Geralt dying at the thought of a cave-in at the other end of the corridor, maybe try a suicidal Aard attack!
