I don't have to quote all of the posts,my fingers
hurt
Hypes from Manga
The databook indicated that Hiruzen was the strongest Hokage that Konoha ever had as well as the strongest of all the five Kage during his era(considering Minato as well since Hiruzen lived longer).The Hiruzen vs Hashirama and Tobirama fight is just an incidental.
I don't know why people seemed to choose not to argue that facts,trying to put Hashirama and Minato above
thatlevel.
Ninjutsu
Both Hiruzen and Itachi were given 5 in Ninjutsu.They're averagely good at it.The others' take this as well for mastering it excellently.
However,Itachi by hype is the best for having Amaterasu as the highest-ranked ninjutsu.
Taijutsu
Despite at his old age,Hiruzen held on his own against two Hokages and for that,was given 5 in Taijutsu.In addition,Enma commented that Hiruzen could've done better in his prime state.
Sasuke mastered Sharingan well (into the point where he can dodge Raikage's V2 Raiton Armor speed.)
Itachi was
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who
couldn't capture his movement and was beaten badly in Taijutsu match.
Hiruzen in his prime can be said is equal with Itachi in Taijutsu feats.
Minato also had shown a bit Taijutsu feats recently in his flashbacks with Raikage,just not in the 'great' level.
Genjutsu
I am not going to compare their feats in genjutsu,since it's a complete
bullshit.But just as a response to Nidaime's post,Itachi had Tsukuyomi, the ability to manipulate time and space.Although he is losing his hype as the most powerful genjutsu user in the latest chapter,many shinobi acknowledged him for being a powerful genjutsu user.Even from
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Stamina
Itachi's stamina is high,without anyone noticing it. He gave a large amount of chakra to Naruto,his vision is blinded,he was sick but still managed to use Amaterasu(twice),Tsukuyomi,Susano'o all in one fight.So,in essence,
he was actually killing himself,draining his own chakra.This is supported by the fact that he didn't intend to win.
Minato' stamina is very bad,as he
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Hiruzen in his prime can be said having pretty much stamina
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Conclusion
Yes,I am an Itachi's fan,
why fight it?