Tsunade uses Byakogou to boost Wind Release: Great Breakthrough so that it knocks away Deidara's homing missiles. Kakuzu can't scratch Manda, and Sasori can only hurt him with his iron sand blocks (sand is weak to oil, so Bunta sprays the iron sand and it dissolves.) Deidara won't use C3 as it will hurt his teammates, and C4 won't be used before Jiraiya enters SM if Deidara is IC- and Sage sensing detects the nano bombs. Kakuzu's fire+wind combo is countered by Manda by shedding skin and going underground, then he comes up beneath Kakuzu and snaps him up in his jaws. 100 puppets get wrecked by snake summons, Gamabunta's sword, or wind release. Oro can use Kusanagi to attack Deidara in the air or intercept his clay birds, and Jiraiya can make a shadow clone beforehand to fight in his stead of his abilities are needed (Tsunade can enhance the clone's attacks). Actually, Tsunade can just pump Jiraiya full of chakra so the summoning ritual takes less time...not sure if that last part would work tho.
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There's literally no reason for the Akatsuki members to work individually like you are implying they would. In fact, it would benefit them all except Hidan to get up into the air on Deidara's birds. And neither of them care about Hidan atm or have problems with using their own comrade as a meat shield. Sasori, Deidara and Kakuzu all hop on multiple birds and fly away which means the scenario in which Deidara uses C3 is fully possible.
Iron Sand cannot be dissolved by oil. Hope you realize that such a thing applies only to normal sand, and even then it, took oil plus water for it to be unusable. Normal sand falls to electricity, Iron Sand is buffed by it. Clearly different workings. Oil can't do anything to a completely different type of material to normal sand. At best, it will power up Deidara's explosives once he creates a heated reaction near the oil.
Powered up Wind Breakthrough is easily countered by Sasori arming Deidara's bombs in Spears and then using his magnetical force to row through the pushing force of the Fuuton. At worst, Kakuzu helps them replicate what Gaara and Shukaku did by using Atsugai, that is naturally a lot more powerful than Wind Breakthrough, to increase the pushing force of Deidara's and Sasori's attack by pushing Sasori's IS downwards like a bullet.
Unlikely Jiraiya manages to enter SM once Kakuzu uses Gian to affect Iron Sand's electromagnets and expand the amount of it massively. More so, I'd like a page that SM can see C4 on a molecular level because just sensing it won't do the trick. Sasuke thought C4 was a dud when it poofed and Deidara's chakra that was filling it got released out of it. He even breathed C4 in and only noticed that the bomb wasn't a dud when he saw bombs on a molecular level. In other words, seeing Deidara's cloud of chakra being released from the bomb shape that poofed away will not make you think the chakra cloud is dangerous. You will just think Deidara's bomb was a dud and that because the shape poofed, the chakra stored inside got released and is just a waste. Kusanagi gets countered by either Kakuzu, Sasori or Deidara if it tries nearing Deidara.
With Deidara's clay mines and Sasori's Iron Sand covering the battlefield, they will not only own the whole battlefield as their own field, but they will also have better defenses and attacks due to Gian expanding Iron Sand to massive amounts and Deidara being able to create village-level bombs.