Since we are assuming he can do everything BM Naruto can do and i agree as yin kurama and Yang have the same abilities, that should also mean that Minato's BM also gets slapped with the initial 5 Mins limitation as i am assuming this was also his first time in BM Mode.
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Comes down to whether you believe Minato in BM can defeat EMS Madara is 5 mins or EMS Madara + Kurama, before his Bm runs out
l0l that was when nardo 1st transformed into bm. if we go by war feats minato's kcm form worked longer than nardo's, nardo lost his kcm after fighting nagato fft. minardo was fighting jubi jins yet only lost his kcm after nardo's kurama took chakra from minato kurama. if anything minardo showed more resilience.
also nardo's second transformation was of 8 min and couldn't keep up only because yang kurama run out of chakra
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and after this nardo lost bm only if kurama run out of chakra. minardo never showed any such limitation, he lost his bm when yin kurama's chakra got sucked (run out)
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so this battle is basically bm nardo + minardo's ftg + minardo's barins, experience, ninjutsu and sealing techs etc to which ems madara loses with or without kyuubi
edit: even if we say minardo loses bm after 5 mins because it's his 1st transformation but then also ems madara with or w/out kyuubi can't do shit to minato kcm or even base l0l minato can escape from all madara has to offer.
hashirama was easily able to outrun madara's kyuubi tbb+susanoo sword attack
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