I dont get how you ignore a bunch of
You must be registered for see links
. Even the smaller ones still all tower over Sakura. Katsuyu clones all stay in front of Jiraiya. So he needs to go through each.
Honestly what kinda of reserves do you think Itachi has? Any genjustu, any clones, any crows. All of that depletes his crappy reserve. Yes he has a crappy reserve.
Your idiocy is simply increasing. You said Katsuyu splits into a bunch of pieces and Itachi will have to go through them to reach the rest. That is not true. Itachi can simply ignore Katsuyu as she lacks any decent mobility, and isn't even that big when split several times. And by this manner, they are covering Jiraiya from all angles. What's stopping Totsuka stabbing right through not only Katsuyu, but also Jiraiya who cannot even evade Totsuka when restrained to such a small area of free movement.
Don't ben an idiot. Against Sasuke, he used large a crow Bunshin, several genjutsu at the start of the fight, more genjutsu later on, Tsukiyomi, a large scale Katon and then enhanced it with Amateratsu, used a normal Amateratsu at Sasuke, lost a massive amount of manifested chakra when Kirin
vaporised his v3 Susano, meaning that chakra was lost, put up an entirely new chakra for his v4 Susano, used Yata and Totsuka, repelled tagged bombs and Sasuke's kusanagi sword, fought Oro's Hydra with his v4 and shit on it, sealed Orochimaru, turned off his Susano, went all the way to Sasuke and used his Amateratsu transcription seal which would activate upon seeing Obito, effectively another Amateratsu. And then he tires from this bullshit you speak of? Joke no more, Itachi's reserves are impressive whether you like it or not. He doesn't even need 75% this amount of chakra to win.