This is one of those situational fights that could go either way, Itachi's Tsukiyomi is a sure kill, but Minato can kill hundreds in an instant. I will say that if Minato were to place hundreds of his FTG Shuriken all over the field, which he could easily do, he'd win, every shuriken means Minato can poof at any given time at any given instant, and if Itachi uses Susanoo, I doubt he could kill Minato, and Minato could just wait until Susanoo and Itachi's various jutsu take their toll on him.