yes, i am raikage fan, but i am realist too
we know only of kakashi being able to open 1 gate, if he would be able to open more, why wouldn´t he used it against akatsuki for example?
1) no one said he would beat itachi or madara, we all know those 2 can beat him
2) 1st gate isn´t faster than raikage in his armor
3) kakashi is maybe smarter, he does have more than 1000 jutsus, but what rank are they? i mean most of them might be only like E or D-ranks + kakashi´s chakra ISN´T HIGH, i mean, kishi DID MAKE MISTAKE in part 1 where kakashi created like 100 clones, that´s impossible with current knowledge we got on kakashi
4) kakashi having more experience than raikage? i will say this, NO
not sure if he would beat itachi or nagato, but he WOULD BEAT JIRAYA