We havent seen enough of ems sasuke.
What we do know is that majority of those sumarai's and the kage's body guards would get 1 shotted with that amaterasu spam he used on zetsu.
Might be left with a few body guards and the 5 kages.
At first i thought Onoki and A can tag team and break his susano, but i thought and i believe this is highly plausible. Ms sasuke was able to mold amaterasu on v1 susano. I wouldnt be surprised if he can mold it around a complete susano, meaning A and Onoki's combo wouldnt be ineffective unless A wants to lose his other arm.
Anyway Mei still has her lava release which has caused sasuke's susano trouble already and even melted madara's abit. Anyway 5 kages would win with mid and possible high difficulty