Kisame & sasori mid-high diff
Kisame has been shown to be able to go toe to toe with killerbee, water dome makes him faster too (but thats his trump card). & you gave them full intel, that means sasori wont be bothered to use hiruko as he's impatient & would want to end the fight quickly.
Sasori can fly on iron sand, similar to the way gaara & his father do it, this way he can spam his iron sand which can break the sound barrier. Fast projectiles from the air combined with powerful water techniques from below immediately put them at an advantage.
Full intel also means that the raikage would try to do something fast, but if kisame starts off the fight with suiton it will give sasori the time he needs to prep his iron sand.
Neither of them have a counter to poison either, so until kisame uses water dome then all the water will be poisoned around them. Kisame obviously cant swim in the poisoned water but he can use water dome once sasori's iron sand is over & he decides to use 100 puppets.