well itachi was good the whole time and dnt compare obito's genjutsu....itachi's use of clones would make him a nightmare for tobi, he'd figure out kamui faster than kakashi, get a shadow clone in obito's dimension and that would be game...
Everyone can figure out that he needs to materialize to attack, but is he fast enough to hit him.....it's unlikely
Minato had ftg for that
Kakashi had kamui which connected to his dimension
Konan had a long time to prepare for him and was willing to kill herself to take him down
Kakashi managed to avoid Itachi's genjutsu the second time around, and Obito knows more about the sharingan and it's weakness
Sharingan can see through clones, Madara said his eyes let him even see through the wood clones(but he didn't have it on when he got stabbed by one)
Amaterasu is not instant, it takes time to charge for Itachi
Susanoo can be phased through, and Obito is fast enough to dodge it
so I don't really see what Itachi can do
