Minato > 5 current Kages
- We know he can now use clones who themselves can perform FTG
And with Kyubi's chakra, he can definitely create plenty of them and maintain them for very long if he wants:
With clone usage, he won't be outnumbered and could infact use them to take care of some kages. They may be clone, but they are still copy from original, so far from weak especially in Kyubi mode with the night infinite chakra. For example we've seen how Naruto's clones were dealing kages during this war, so they would definitely not be easy to deal with, especially since they can perform FTG themselves, so how could they hit them in the first place?
- He is faster than any of them in base and only A could really be a challenge(himself being slower than Minato). With KCM boost, Naruto passed from a slow turtle ninja(exaggerating) to the fastest ninja in base, so Minato being already one of the fastest in base is probably even faster than Naruto now in base. Infact when everyone was rushing, Minato's clone outsped the entire battlefield with FTG, shocking Tobirama
- His markings never disappear, so with one touch on any of the Hokages and they are screwed. Whether he would send his clone or himself to finish the job or redirect attacks(like Onoki's Jinton) on themselves will depend on him
So i think he has the means to defeat the 5current Kages, but what do you think?