Hey, well I read the one in your sig, and I think I know something you could work on.
1) In your fic, I was kind of confused, a lot of the time. Some of the descriptions were great, but the flow of it was very confusing to me.
2) It sort of seemed as if you started your fanfic in the middle. There was no intro description of the characters, nor of the general idea of things, it just sort of jumped right into the action
3) The action- Pretty good, and a nice twist at the end, but it was very confusing like I said. She got stabbed, but then she was back alive? He looked like hell, but then he looked like hell again later? Who was his brother again? Maybe a bit more organized.
And that's all for know. Anyway, if you would like my help, feel free to PM me. I'd be glad too. Otherwise, keep at it, and eventually it will click. That's what happened to me anyway.
PS. Sorry, I'm tired, so I might not see something in your fanfic. Reply if I got anything wrong.