No intel? Raikage is a simple enough fighter anyway so that's a heavy advantage for Jiraiya. Anyway, Jiraiya wins with frog song genjutsu. First he will use Yomi Numa to turn the ground below him into a swamp. Then Shima will summon two boss toads to distract the Raikage, and Jiraiya can leave a shadow clone with them to also buy them time. Then the real Jiraiya will summon one of his barrier toads (
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), which he will crawl inside, then the toad will hide in the swamp. Ma and Pa can safely prepare their genjutsu inside the toad, with Raikage having no idea where they are in the massive swamp. Then when the genjutsu is ready, Jiraiya will summon a big toad below him to push away the mud like it pushed away sand (
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)-(
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), and it will push Jiraiya above the swamp. Once Raikage hears the genjutsu, he will become paralyzed and his raiton shroud will be deactivated. After that all it takes is another Yomi Numa, and Raikage will sink into the swamp and drown.