kabuto summons 32 edo tenseis and proceeds to solo both at once.
assuming they dont give him that kind of time, he turns to water and sheds his skin while going underground to get some distance, then does the above.
edo itachi could have beat kabuto alone imo. sasuke didnt really save itachi in that fight, if anything, he got in itachi's way and provoked kabuto to pull out several techniques which made itachi vulnerable since he doesn't want sasuke hurt
lol and im sure sasuke didnt want itachi hurt either, edo or not. hence his reaction whenever itachi was. so they held each other back. and no, sasuke did save him several times. itachi could not have gotten out of genjutsu without him. and kabuto would have fought differently if he had no inhibitions about killing intent.
f bloodlusted madara swings his PS sword at the very beggining
kabuto senses it coming and hides underground. a swinging sword is far slower than a susano arrow nigh point blank
white rage couldnt even stop itachi from using susano. perfect susano fodderizes. flower tree world fodderizes.
perfect susano takes an immense amount of chakra to use and wont be stabalised immediately. in that time, edo mu disintegrates it. same with flowers. kabuto would have given his body antibodies and countermeasures against being poisoned. its careless of him not to
kabuto gets stomped against either of them with no diff.
how do they stop 33 immortal zombies at once?
How is Kabuto going to penetrate PS?
its not instant. he beats madara before it stabalises