I got stuck in chapter 10 where I need to kill Lara, what I did I ran all the time and only realized that I need to fight her when I got to the last room where one jumps down and there is no exit and you are forced to fight. I manage to burn her on all 3 corpses at the bottom and 2 pipe shots, I also throw 4 grenades on her while she's burning, I then use all the shotgun (8+10+2) and all the explosive bolts (3) and she still gets me. After replaying last part (and getting my head bashed ~30 times) I started to wonder why is this so hard.

**Does damage dealt to Lara before getting to last section of fight counts? Am I better of replaying the chapter and dealing her early damage rather then trying to beat the last section?**