Hidan may be immortal, but his body works and move like a human one, thats why i think black lightning will paralyze and immobilize him.
I know he tanked kakuzus fuuton and moved with weapons sticking in his stomach, but these attacks were just destructive ones, while daruis lightning paralyzes the opponent making his body numb.
Hidan showed to feel pain
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and was immobilized by shikamarus Kage Nui no Jutsu even though this shadow technique doesn't control the opponents shadow, but pierce his muscles to immobilize him this way
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I don't see why hidans immortally gives him resistance against raiton paralyzation which renders the body numb.
Daruis black lightning had the capacity to paralyze multiple Zetsus, Hidan won't tank a technique of that level.
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After the immobilization, darui will cut the latters torso in half with his raiton infused sword, which will give him the victory even though hidan won't die.
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