Board Thread:Versus Debates/@comment-26958911-20151010214426/@comment-26127155-20151024201416

@Greatestsin Itachi might have relatively low chakra reserves but he makes this up with his supreme chakra control. In his last battle against Sasuke (when he was going to die of his illness anyway), Itachi used; Ameterasu several time (covered the mountain area), used Tsukuyomi on Sasuke, cast several different genjutsu in a row against sasuke (including crow clones), fire ball jutsu, and he used Susanoo while he shouldn't of had enough chakra to perform a jutsu (Sasuke's sharingan analysis of Itachi's chakra reserves). Itachi's stamina issues are greatly exaggerated as if a deathly ill Itachi can use all these jutsu, a healthy Itachi would probably be able to use many more. This generally means that Itachi's low chakra reserves were just hyperbole or he is one of the most efficient ninja in the series (due to insane chakra control).

@Bakumatsuwarrior It doesn't say in the anime anything about the character just having to be strong, in order to be immune to genjutsu. I don't think any individual is immune to being trapped in a genjutsu (Itachi's chakra reserves were already trumped by most of the character's he versed in part one), but more experienced individuals would notice the subtle (or obvious) changes that are occurring to them or the environment (and then try and break out the genjutsu with the usual methods).