If Kishi wrote this fight, the Uchiha would win with only a bit of trouble.
But I think FTG and Minato's reactions are too cracked lol. Amaterasu and Tsukuyomi is a non issue to two sensory type shinobi, Minato has large chakra reserves (sage mode requires as much) and anything he infuses with his chakra (which he was the very best at until Naruto came along) is permanently his FTG seal.
Legitimately, their only hope is to get one of them into Kamui dimension ASAP. Otherwise you have two guys who can teleport to any seal or area they mark with chakra, can mark each other to always teleport to one another... And all their shadow clones too.
I just don't know how these characters fight that. Especially when Sick Itachi and this vers. of Sasuke are almost liabilities to Obito. Neither can tolerate this offensive for long.