Edo Itachi can literally solo here, one of the most broken characters in the manga, coupled with intel on Kamui as well? Sheesh, overkill.
B, either is Tsukuyomi'd from the start, set ablaze by Amaterasu, or sealed via Totsuka Blade.
Then it simply comes down to Itachi vs Obito. Yata Mirror canonically despite the naysayers would protect Itachi from Kamui. Even if Yata Mirror isn't exploited, which is faster Ephemeral (which he can cast through not just his finger as Apex, and I believe Varrah have established) or Kamui?
Clearly Ephemeral would be faster as Itachi could emit the Genjutsu from his stomach, which is exactly where the chakra network is fed chakra from; whereas Kamui needs to be channeled all the way to the user's eye.
Therefore, Ephemeral > Kamui in execution speed, if executed closer to the individuals chakra storage. Once Obito is placed under Genjutsu (which he would break out of seconds later most probably) it'd be too late as Totsuka Blade finishes the job.
Jiraiya sits back, and chills.
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