Stopped reading right here. The rest of this post is clearly nonsense based solely on this. Itachi wasn't born sick, nor was he born with 3-MS-jutsu = blindness. Why not use any other itachi who appeared remotely healthier? Because you won't have the 'he can't even walk without dying' argument to fallback on.
Anybody who uses deathbed itachi as a reference point is as much a troll as any other trolls. How bout you go make a thread where itachi isn't coughing up blood by just walking around.
Itachi wasn't born sick, no.
He was not born with MS either.
However, mastery of the MS degraded his eyes and body. The more powerful his MS became, the more blind and sicker he became. It's a double-edged sword, an Itachi with perfect health and perfect MS mastery cannot exist.
Can you show us that Itachi? Hell, he used three MS jutsus in pt.1 and had to rest. The only other Itachi you could show us is from when he was 13, and the only MS jutsu we know he mastered back then was Tsukiyomi.
I agree with most everything except your saying Itachi is a suitable representation of Susano'o in means other than similarities in weapons; as related in the Kojiki, Susano'o is a hot-tempered, restless deity that destroys Amaterasu's rice fields and desecrates two of her servants. Aside from that, nice thread.
Agreed.
Points to his similarity to Susanoo are very loose at best. Itachi just has a jutsu based on Susanoo.