say itachi's like the einstein, jus b'cuz som1 is not at that level dusn mean i'm saying that person is dumb...he is reckless when it comes to battle...after facing raikage n using up most of his chakra he goes off to fight danzo when he knows the other kages are there...than tries to pursue danzo thinking the two kages there are just going to sit n watch him do his dance, after danzo's fight he tries to take on kakashi..after one susanoo arrow he cudn even maintain susanoo..and if zetsu and karin werent there to help him along the wai he wud hav been dead..i cal that reckless or really stupid, i think the first one makes more sense.sasuke was never really dumb u kno that right he was just in a rush to kill danzo, see his other battles he is not that reckless, and when he uses ems he gains itachi's powers becos madara says that both of the powers of the eyes become together or something like that but here is a linkYou must be registered for see links
And even without dude he used genjutsu on danzo and that guy is not dumb he is very cunning. Itachi lvl genjutsu can't just be repelled by ppl who are smart otherwise shikamaru would be the perfect counter to genjutsu, that is just not right.
i thought genjutsu's were cast with the mind, i.e more inteligent u are, the illusion u create seems more real, the best example i can think of is the movie inception...he wasn after the architect that was coming first in class..he was after the best and the brightest