Board Thread:Versus Debates/@comment-32466165-20170722022140/@comment-25122992-20170804100112

Rinnegan was called a strongest doujutsu amongst 3 great doujutsu (which includes Sharingan as well) even before most of MS techniques were revealed, so it's a ridiculous statement too. What's more important, as Itachi himself stated, no jutsu is perfect, each and every one has a weakness.