Their is no such thing as a weak Akatsuki member. All of them are dangerous. Hidan is one of the most dangerous members of the Akatsuki. The problem he is idiot. Think of Hidan as Jason Voorhees, but on steroids.
Hidan's immorality: I personally think Hidan has super advanced healing factor. Allows him to heal almost any wound in a rapid rate. The only way to stop him is to cut off his head. You have to separate the head from the body, and keep it away from the body.
Hidan Vs Yugito Nii:
The entire building was destroyed during the battle. Not to mention the surrounding area was damaged after the same battle.
Yugito Nii mastered her tailed beast transformation. Making her absolutely deadly. She was at 100 percent full power. Yugito Nii ended up losing badly.
I personally think Kazuku did most of the work. I don't think Hidan would be able to take blood from her in her tailed beast form. Unless Kazuku caused her to revert back to normal.
Think Yugito Nii as if Gaara mastered his tailed beast.
Hidan knows no ninjustu or genjutsu. He is mostly a physical fighter. Meaning his taijutsu specialist.
Hidan is basically Jason Voorhees, but way way stronger, and way more dangerous. He is pretty underrated. This a very short blog to clear up misconceptions.