Sage Mode won't be much of a factor as per Minato's own words.
So I'd only judge base Minato. That being said, Amaterasu and Susanoo won't be much of a factor against Minato given his speed and capabilities of his space time Ninjutsu (being able to relocate large objects like Susanoo quickly). So it will come down to Itachi's feints and Genjutsu. Minato is a sensor, but we know that this alone won't make a battle with a Genjutsu expert like Itachi easy, who could force you into eye contact one way or another.
Also, it depends on whether the relocation of Susanoo counts as a W, because he would not have beaten Itachi effectively, though Susanoo on the other hand won't really be able to land a hit either. Sounds like a stalemate.
I think it's an either way, both have a case
So I'd only judge base Minato. That being said, Amaterasu and Susanoo won't be much of a factor against Minato given his speed and capabilities of his space time Ninjutsu (being able to relocate large objects like Susanoo quickly). So it will come down to Itachi's feints and Genjutsu. Minato is a sensor, but we know that this alone won't make a battle with a Genjutsu expert like Itachi easy, who could force you into eye contact one way or another.
Also, it depends on whether the relocation of Susanoo counts as a W, because he would not have beaten Itachi effectively, though Susanoo on the other hand won't really be able to land a hit either. Sounds like a stalemate.
I think it's an either way, both have a case



