Hashirama wins this
--Once SS comes out, there is pretty much nothing that minato could do, throwing TBB is meaningless when the hands of SS can just grab and slam them right back at minato, and the starting distance just leaves minato vulnerable for Chojo Kobetsu which pounds him and takes him out,
--the utility of FTG is also not helping minato, not when the onslaught of SS and the kurama avatar has an AOE that completely bypasses its limits, and forming clones is also not helping, when all the surrounding clones are poofing in the cross fire
--minato having the time limit on his BM only makes matters worse, since the instant he loses his avatar, he dies