A & B win this
--None of the sannin can react to V2 A's speed, and regardless of jiraiya starting in SM, they still lack the reaction feats,, and would end up constantlly on the defensive against his speed
--Double lariat combo from A & Bee would end up beheading any of the sannin, however tsunade is most likely to get finished this way, since alll of her offense is based on taiijutsu and CQC,,
--Yomi Numas (YN) doton effect is negated by the duo, thanks to their raiton affinity
--Orochimarrus hydra is also getting bisected by A's lateral chops or its eradicated by Killer Bee,,, neither are orochimarus poison based attacks effective since not only would he struggle to land them on A, the latters RNY would also ensure that he is safe,, seeing how he tanked chidori blade with little to no damage
--none of the sannin have any way of defeating killer bee once he goes full hachibi mode, as he would fire barrages of TBB along with super TBBs that will nuke the sannin off the planet
--summons are non factor when they are fared off against bee since all of them are vaporised by TBBs
--Jiraiya is also not prepping frog song here since the other sannin would get overwhelmed by A's speed and the fact that killer bee can enter Hachibi immediately and fire off TBB barrages much faster than jiraiya can execute this genjutsu,,, which is why the jutsu is never happening