Yeah but the only reason that happened was because Deva got the real Naruto and almost killed Hinata and he let the beast out 6T = no real thought just attack same as 8T.I thought the 5 kages would win easily too, but then you have to think about the fact that a sick nagato's deva path fought up to 8 tails of the nin tails without the intent to kill,the 5 kages together wouldn't last against six tails of the foz
Whereas the Kages combined are intelligent enough to figure out the 5s thing before they die and dust release etc can stop chiabku tensei.
Kages still win this only reason Naruto took so long to win is the fact his intelligence isnt that great.
5 Kages are gonna figure out Deva Path and create a strategy etc...fight would be over in half the time of the Naruto vs Pein fight