Surpass Gai? Based on him keeping up with KCM Naruto who's speed is inconsistent? Whereas Gai was able to intercept Haku in Ice Mirrors and Haku's meant to be almost instantaneous while in that technique.
Yeah, Itachi's clever but Gai's no slouch either. He was able to counter Kabuto's genjutsu before it had taken effect showing that he's experienced in acting against genjutsu.
Again, Gai can easily Kai out of that genjutsu. It's not a pain-inducing genjutsu so it doesn't paralyze him and thus shouldn't pose a problem. Naruto's never countered genjutsu using Kai so this is irrelevant.
Fire release enhanced kunai? Care to show me some scans of that? Gai has his nunchucks so he can effortlessly block those kunai with them and you're forgetting that he has to look into Itachi's eyes, not the other way around. They both have to establish an eye connection for Itachi to use his genjutsu. If Gai looks up he isn't going to look at Itachi's eyes, he'll be looking at said kunai.
KCM Naruto's speed is inconsistent. Sharingan's pre-cog isn't like Spidey's Spider Sense, it doesn't grant a guaranteed counter against physical attacks evidenced by Kakashi beating Obito in taijutsu and Obito not reading
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. Factor in Itachi's stamina which was awful and also factor in Gai's strength, who was able to punch a full grown man through a wall which was back in Part 1.
You clearly seem to doubt Itachi's speed. Let me teach you a thing or two about Itachi's superior speed...
[
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]-->[
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] In x, Itachi's speed is quite far from Bee and Naruto. His blitz is quick enough to prevent Bee from reacting, someone who has shown immense reaction speed throughout the manga, distinctly displayed in the Minato fight. The only reason KCM Naruto reacted was because he is a sensor and can sense Itachi's future negative actions. Note the '
!!?' that is used in the scan, when Bee is constantly being caught off guard.
[
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]-->[
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] Again here, one should note the distance part in x between the two teams. In y, however, Itachi blitzes so quickly he catches Bee off guard, and has to inform Bee of his whereabouts to give Bee a chance of evading. Note both of these are on the likes of someone who is in top 5 reaction speed of NV. His reactions have shown to stop Minato's FTG, twice [
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][
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]. Itachi blitzing him as something to be truly praised..
Another great example of Itachi's immense speed is given here [
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]-->[
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]. Bee and KCM Naruto attempted to strike Itachi whilst Itachi was speaking. Yet, Itachi still managed to effortlessly dodge. However, that isn't the impressive speed, the impressive speed is shown in y, when he's already went back to position next to Nagato, while Bee and Naruto's positions remain completely unchanged. Notice Bee and Naruto's positions from x>y, there's absolutely no difference, not even Naruto's headband and Bee's scarf have moved, which is truly an impressive feat.
For his final feat [
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], it is once again impressive. He blitzes a SM user, who not only has increased reaction speed and sensing abilities, but also effortlessly dodged half the attacks used by Sasuke and Itachi, in addition to Enton arrows.
I am not going to completely reply to the rest now hat you realise the difference in speed. I will add that fire enhanced kunai's are seen here [
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]. Gai looking up to where Itachi jumps would result in him being put under genjutsu. tai not looking up will result in him not realising what is occurring, and attempting to block when he finally notices them, at which point he will be severely burned and vulnerable. Naruto had help to counter the genjutsu's he's been put in, so it is indeed relevant. Gai having been put under crow genjutus can be chained with another genjutsu of a higher caliber. Finger genjtsu is always relevant when he doesn't make complete eye contact. The scan of Sharingan failing is inaccurate. First of all, Obito did remain unaffected, so your point was moot. Second of all, Obito was fighting KCM Naruto, Gai, and Kakashi. You don't seem to realise fighting 3 opponents at once is different from focusing all your sight on a single opponent, which is easy to read due to his linear fighting style. Itachi will not be hit in the first place to have to react to Gai's mediocre strength. Your part 1 reference doesn't prove anything, the guy was an extreme fodder, I don't even consider that a feat seeing as though Itachi can do that with ease as well to some random fodder... Anyways, clone feints destroy Gai. Crow clones that are hit end up changing to kunai's and attacking Gai, all the while Itachi si attacking from behind. Clone feints are easily enough to destroy Gai with the speed Itachi uses them at, which is often underrated. Gai will punch though an explosive clones, and end up leaving himself vulnerable. Anyways, chakra won't be as much of a factor as you're making it to be. His only jutsu's will be clone feints, shunshin, and kunai's enhanced with Katon. Hell he did tonnes more than this in his fight with Sasuke, and he was at the verge of death by then. You have to realise amateratsu techniques without EMS are extremely taxing, hence why people often say "Itachi's stamina isn't enough to fight for longer than 5 minutes" and other nonsense like that. Just remember, this is 3T Itachi using rather non-taxing abilities.