Could shikamaru overcome itachi or kurenai in genjutsu?

[choft]

Never. Itachi knows susanoo tsukuyomi amatearsu and izanami

The ones in bold. What has that got to do with the question the OP asked?

 

[NOemotions]

His genjutsu doesn't have a lot of weaknesses though.

prolly not, but whole dude does.