few things;
1) His genjutsu can only be used once a decade unless u have hasihrama dna. hey shoutout to hasihrama can this guy get any better. Imagaine him with a sharingan he already was good with genjutsu doing A-rank genjutsu without sharingan.
2) Just because u dont know ur in a genjutsu doesnt mean the people around you dont. For a jutsu that is so powerful it can simply be removed by someone else injecting chakra in you.
3) No one is invincible, Ao with his byukgan had his run ins with Shui and he surived. Hey shoutout to the bykugan hey.....!!!