Minato can win you a game single handed, just because some ninjas are immune to debuffs does not mean minato is automatically useless. I have killed so many sasuke sussano teams and ay teams it's almost laughable plus ninjas like roshi and even sussano itachi (which is like 3000 seal scrolls) can't even touch him if he is in the back, all you need is one tag just one and the team goes boom. plus if you use minato with earth main sometimes he can attack up to six times with lightened boulder jutsu, he gets his last 2 attacks when you click on his mystery because that counts as an ''action'' too.