Board Thread:Versus Debates/@comment-26998824-20150927013622/@comment-9782468-20151102132119

Sasuke's Genjutsu is far from mediocre, he's actually very good at it. He just isn't as good as the masters is all.

Kakashi was able to duel Obito in Genjutsu and tie. Obito is probably pretty proficient with it, what with being trained to be a near mirror image of Madara in life by Madara himself and keeping Yagura in Genjutsu for so long

EDIT: Oops but this is off topic. Back on topic, I think someone skilled enough in Sharingan Genjutsu can catch a Rinnegan wielder in it. A master with a stone can beat a rookie with a kunai.It's just the level of skill. Shisui could probably catch Nagato in Koto, or even another Genjutsu for a hot second, given his mastery of it.