What're you talking about? Sasuke not reacting to V2 Ay was because he was being a reckless Emo who didn't bother using his brain or even trying genjutsu. On top of that he was gaining his powers as the battle was progreasing. FTG works on different mechanics Ay charges in and blitzes yet killer Bee's faster than him. He was able to react and save At and counter Minato's FTG sneak attack no problem.MS Sasuke couldn’t react to to level 2 Ay so he’s not reacting to FTG.
Minato has clones so genjutsu is a long shot...
I had no idea EMS Sasuke was going to get so much support yet alone MS.
Btw living Minato never made use of Shadow clone Jutsu in combat. He only used it as an Edo not that it makes a difference, it's not impervious to genjutsu and Minato throws away more stamina. To add another point according to Kakashi neither he nor Minato had enough chakra to form a shadow clone to add the elemental chakra nature to the rasengan which should put his reserves in context for you.
Who mentioned EMS or support?