Cliches exist for a reason... but each story, while dealing with cliches, still needs to have some originality within it.
That said, your chapters are too short, and the "break" between them is not clean. You're leaving out scenes such as how Harry got a staff, what the difference between a staff and a wand is.
Of course, the reason why I'm reading this is I saw you mention "slave!Tracey", which hasn't happened yet. Also "Harry+Fleur" is another reason.
It seems you don't have a editor/beta-reader, and I suggest, as one writer to another, that you ask around to find one. Having someone else go over your work will help you a lot.
Author's response
I have some really cool ideas for Tracey! I really like her, it's a shame Rowling didn't do more with her character - but I'll fix that, believe you me!
Thank you for reviewing.