Considering they are in a cave Kabuto has all the advantage here and Minato and Tobirama dont have really any defensive jutsu in their arsenal like Sasuke and Itachi did amaterasu susanoo etc
If Kabuto plays his cards right he can take this high diff
Give him 1 or 2 clones mid diff
Change location to an open field and Kabuto gets smashed
If Kabuto plays his cards right he can take this high diff
Give him 1 or 2 clones mid diff
Change location to an open field and Kabuto gets smashed