He didn't achieve that himself so he can't use that & either way Tosuka blade.
Tsyukuomi , Alot of people that went up against learnt his weakness of that Jutsu.
I choose both & his Susano'o can handle that just like Sasuke did to Danzo & Itachi knows all of the weaknesses of Rennigan.
He didn't resurrect them so there not his & After the battle with Kabuto Itachi learned how to stop Edo Tensei so that's out of the picture.
& It can't block Tosuka Blade.
I also corrected your statement.
The Gedo is his summon, it's his ability.
Totsuka only pierced an Edo body and Orochimaru's body. It says it seals everything it pierces but, it doesn't say it can pierce everything.
Obito has Tsukuyomi himself, he wouldn't fall for that.
Itachi can barely keep up his Susano'o for 5 minutes.
Obito most likely knows about Izanami.
Madara's Gunbai blocked a TBB from BM Naruto.
Totsuka can't even hit Obito because of Kamui.
Itachi Has Shisui's Eye = KA / Kotoamatasuki
He Can Put Obito in A Genjutsu W/ Out Obito Even Knowing
/Thread
He gave it to Naruto before he fought Sasuke.