Think about it... first the sharingan is weaker than Mangekyo sharingan (this was even proven by Itachi vs Sasuke fight ), then Eternal Mangekyo sharigan vs Rennigan (Eternal Mangekyo sharingan wins): Itachi vs Nagato (although itachi had only a mangekyo sharigan). wait a minute, is it just me who can clearly see that the famous Rinnegan that Sage of six path himself had is way weaker than the eternal mangekyo sharigan? why? and according to the manga, rennigan advanced the mangekyo sharigan? it seems pretty clear to me that the one possessing the Rinnegan alone is way weaker than the one with Eternal Mangekyo sharingan. what do you think?