****ing stupid.
Sasuke outlasted 10 min izanagi with susanoo. He started with susanoo, he summoned even bigger one against kakashi, not to mention all other jutsus. Sasuke can simply hold susanoo there for over 15 min no sweat. Surely itachi can do 10 min, if he mixes lower versions of susanoo into play he fight and hold it for around 10 min.
MS blindness has nothing to do with chakra consumption. Itachi was already blind when he soloed oro but still had susanoo and items up to finish sasuke and give him amaterasu
Your a Noob! Sasuke didnt outlast danzou with susanoo! Sasuke out lasted danzou with every tech he had! Susanoo was up for small moments because he had no choice, Let me school you noobs real quick since its obv you dont read the manga:
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This is sasuke using the weasest stage of susanno! And with a fresh pair of MS (not like itachi 5+ years of having it)!
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Sasuke for a few minutes trying to use 2 ms techs completely drained his Mangekyo sharingan usage (before he got a chakra boost from anger) to use susanoo. He could still use ninjutsu and tsuku, but his chakra was too low to keep susanoo up.
And the only reason he leveled his susanoo up was because of the unkown chakra boost from hatred:
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Sasuke is in major pain even with his chakra boost:
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And finally even after getting a major chakra boost from hatred (plot) he couldnt even sustain The final susanoo for a couple of seconds:
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And keep in mind sasuke was giving 2 hatred chakra boost and was healed by karin. And also take into account sasukes stamina in the databook (pre MS) was a 3.5 while itachis is a 2.5...
Im not saying he couldnt be smart with susanoo unlike sasuke, but with the ammount of yeas he's had ms compared to sasuke; he has no choice but to be smart with susanoo!
Why would he keep it up for 10 mins and risk dying or going blind asap?????? Thats retarded and un-itachi like no matter the situation! He has more to offer then just MS techs noobs!