This isn't going to block Hidan's scythe, the executioner blade is a one dimensional sword which is easy to counter or block, Hidan can attack indirectly with his scythe whose trajectory is hard to predict, he can modify the trajectory with a metal cable and easily draw his blood. You were unable to provide proofs that his skin could block metalic weapon, all I see in this scan is him blocking it with his fist while the rest of his body is vulnerable therefore Hidan will easily draw his blood.1. Here is my proof that he blocks metallic weapons>
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2. Juugo is very fast when he needs to be. As shown when he uses chakra boosters on his back to greatly increase his speed to dodge a V2 Killer Bee who had launched himself toward him. This greatly puts juugo's speed over Asuma and Shikimaru.
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Chakra boosters greatly increase juugo's speed.
Juugo actually isnt that slow to not hit hidan. And hidan will have a hard time getting close to juugo when jugo starts shooting chakra cannons at him. Hidan doesnt have the speed feats to escape juugo's canons at point plant range.
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This will knock hidan out long enought for juugo to rip his arms and head off. Hidan is immortal but that doesnt mean he cant be hurt. He just cant be killed be he had his head riped off twice already. And when that happens he has no control of his body.
This isn't going to be of any use for him as the jet itself takes a while to charge, he needed to evade the area of effect of Bee's attack not only a pinpoint attack, once again he is slow.
Jugo won't even get the chance to pinpoint Hidan with his canon, not to mention Hidan could easily survive the blast.
Once again, Jugo isn't landing a hit on Hidan let alone incapacitate him, Jugo loses.