If TBB and KCM are useless than why is Minato using it??Those are fking useless dude. Sage Mode can be used by anyone with a big chakra pool. Rasengan would never hit if he didn't have the fox.
Ok so him hitting:
Kabuto, Muu, 3rd Raikage, etc. was because of kyuubi huh??? Lol you're really smart....,
Than why doesn't everyone have it??? Like Kisame, 3rd and 4th Raikages, nagato, Kushina???