@bold, that is a weird case, majority believes gai was going slow on purpose, but in any case ftg is instant specially if minato plans the events out beforehand.
Minato can surely dodge everything these opponents have under normal circumstances. It's just that rikudo chaakra unbalances stuff. Kakashi was able to close kaguya's portal with kamui, the same portal that rinnegan sasuke failed to react to. So i am not sure, how much buff rikudo chakra gives kakashi here. He may as well have reactions on par with sasuke and naruto. In which case, minato won't be able to touch him even with ftg. And no naruto can't evade double kamui when he was having trouble against obito's single kamui. Minato can outlast, that is why i said it's a close call. It all depends on how much of a buff does rikudo chakra give.