Itachi's only chance here is Genjutsu, and now that Minato has clones, and the fact that its hard to land Genjutsu on a teleporter who is already fast to begin with, only lessens his chances.
-Amaterasu is useless since Minato has the speed (Hiraishin) and the reactions (Superior to Ay's) to evade it.
-Susanoo is useless offensively as it's attacks will never land a hit on Minato, thus using it will only drain Itachi of his chakra, higher levels only hurt more than it helps.
I give it to Minato. Either Itachi wears down and falls or Minato gets him by warping him out of his Susanoo.
