I finally finished reading. And it was great! It was refreshing and I had fun reading it. It was an extremely good story for a one shot, and I feel like it would be even better if it was expanded.

Vision is 5. Everything was clear, the story flowed well, and there was no point where I had to go back and reread. Everything was put together and told in a way that was easy to follow.

Originality is 4.5. This is because I am bias against Werewolves vs. Vampires. I am SO tired of that theme, but you told it in an awesome way. You made the cliche interesting and tolerable.

Technique is 3.5. You hit a few flaws near the end. by the time of the climax, everything seemed extremely rushed.

1. Samson's talk with the pack was unneeded. While it shown that they were coming and willing to help Donnie, they're wasn't enough emotion nor action. There was no character development.
2. Cassie wasn't a great antagonist. I really didn't care to read about her. And the other vampires were generic as well.
3. How the hell did Samson and Donnie catch up to her?
4. This is a technique I learned from watching a lot of movies and reading a lot. TVtropes.com calls it "Chekvos Gun".

I'll explain... this is when you use a foreshadowed item later in the story to create a great climax. You dismissed the explosives. In a great story, we would have forgotten about them, and then near the end, we see that Donnie kept one of them and actually USED it!

Impact is 4. The ending was too rushed. It started off slowly and well done, but the action was quick and conclusive. It left a feeling of whiplash. The problem with your one shot is that it is too short. It is too epic to be written quickly, and many of the characters could be developed into something better!

You don't have many grammatical errors, your vocabulary is well done, and it is an overall well done story for the most part. You simply need to put more care into the action and the antagonists. I hope this critique helped.