I think you made a few too many jutsus for Hidan. Moreover, they essentially serve the same purpose. In a typical deck, you would have at most 10 jutsu cards, right? Meaning that even in a dedicated Hidan deck you would probably only use 2 or 3 different Hidan jutsus. I think you should focus on making a few that cover a wide array of situations. Quality over quantity, I guess. That's just my opinion, though.
My favorite is definitely Kakuzu. I think you did a great job with his effect.