What the hell? I must be missing something. I cant even get past the second "group" of enemies in the wooden tunnel. I get incinerated as soon as I step outside the first tunnel. If I wait, the whole thing gets burned down. I lose all my life in about 2 seconds, its nuts.
Keep close to your allies, watch the ceiling for falling logs. Run whe they run, rol if neccessary.
Also, the Quen sign helps.
Well, I got passed it, but I never came upon a QTE sequence. I just ran across a short bridge, it landed on the other side, they shot the ballista and that was that. Is there another dragon fight that I am not aware of??