You are also forgetting that Guy distorted the space? Guy's speed > All Akatsuki. There was a reason why I did add Nagato here, and Kisame as huge chakra pool. Deidara cannot even dodge or block one Evening Elephant hit at all, so why do actually Guy let him using bombs when he already knows how it works since the start of Shippuden?
AND there is also a reason why I did not add Itachi and Obito here was because they have the knowledge about Guy's jutsus and abilities. Remember, to beat Guy, you either have to survive or manage to kill him during that state, but escape is not allowed.
I also remember a Kunai being thrown from behind Gai out speeding Gai. Gai would be fighting the whole team so Deidara can use his bombs as konan's papers, Kisame's hidden mist, or Sasori's many puppets. Konan's papers can become sharp and impale so hidden mist mixed with Konan's paper Shurikens can injure or kill Gai. Gai feels pain of going 8th gate for the start of his fight then started to get use to the pain. Hidan goes to Attack Gai who in turn attacks Hidan but in that same moment Sasori use his chakra threads to take control of Gai's bodies which gives Hidan the time to use his scythe to kill Gai or take his blood for his ritual. Samehada can a large amount of absorb such as 6 tails worth of chakra which is a lot, per slash as we seen in Kisame vs Bee. I don't see Gai having that Bijuu chakra and Kisame fused with Samehada allows him to absorb chakra and heal himself so even as Gai hurts Kisame, Kisame will heal and take a large chuck of Gai's chakra and when he hits 0 he dies.
Nagato can pull Gai to him and pull out Gai's soul, Nagato is a sensor and have the Rinnegan. Kisame is also a sensor with Samehada. Nagato can make use of his multiplying dog, rhino, bird that drops exploding eggs, lizard that can go invisible, and many more. For Sasori's puppets, Sasori can still move his puppet's parts with his chakra threads to move their bladed arms. Plus he can use it on Hidan to increase speed and reaction as the immortal fighter fights.