You must be registered for see images
You lose all credist the moment you assumed itachi can keep susanoo up forever!!!
Sasuke nor itachi has ever been shown to keep it up for long periods of time!
You must be registered for see images
Even tobi knows using ms techs in general (spamming) is too much!
Manga shows and says MS equals side effects! Fact!
Itachi knows his limits and would never ever ever use susanoo unless he has to then quickly turn it off because of teh side effects!
You must be registered for see images
Spamming leads to side effects and blindness! Fact of manga! Itachi has had his ms for 5+ years, sasuke had his for less then a month and went blind because he spammed! If itachi spams he goes blind asap! Simple as that!
You must be registered for see images
Even before their fight he was already near blind!
Lets go further though!
You must be registered for see images
even kisame knows that itachi shouldnt spam or over use MS! And keep in mind he has been his partner for years and knows more than you! And he did not know itachi was a double agent so dont say no BS.
What else do you want to prove he cannot spam MS with out side effects!!!!