The only problem Hashi has in soloing Akatsuki is C4, which madara counters thanks to his sharingan, PS slash kills anyone in Atatsuki bar obito, Chojo kebutsu does as well, with the bonus of being able to kill obito due to the sheer amount of punches it lasts more than 5 mins. Tho, as of how the battle goes, Hashi uses FTW and wood dragons while madara stabilizes PS, nerfing the bijuus, madara kills everyone while hashi summons the Buddha. GG Obito.
Note: Hashi would be unable to solo AKatsuki in most cases cuz he cant counter CT and C4 at the same time, if he can even counter the latter, madara warns him about the nature of deidara's technique.
Btw, are we counting the fact that madara can control the bijuus as well?