Madara can switch his eyes within an instant to use ms techs, it's not a disadvantage. He used Genjutsu to paralyze the 4th raikage after a susano'o clone grabbed him, remember?Not Genjutsu. Meanwhile Sasuke can cast all his MS jutsu with RG active. The techs he retained are almost inconsequential anyway so it doesn't really matter. :lol
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