]Again, we talk about MS Obito.. there is no Six Paths Jutsu without Rinnegan, there is no Yin Yang Release for him, neither Gedo Mazo. The only Uchiha Kinjutsu he showed is Uchiha Kaenjin. [/B]
The techniques Obito has access to is Kamui, his level of Mokuton and the huge Katon. The Mokuton is evaded by Itachi, against the huge Katon protected by the Yata mirror, which can be used by an incomplete Susanoo.
As long as Obito is intangible, none of Itachi's attacks works, but neither Obito can land a hit. Gai, Kakashi and Naruto couldn't land a blow, yet none of them received a blow from Obito.
This is what could happen if someone tricks Obito's Kamui:
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If Konan can trick him with paper bombs, Itachi can do it as well with his explosive Kagebunshin. At this point, the explosion of his Bunshin possesses even more momentum and speed. Such a maneuver is not a sorcery for someone with Itachi's level of intelligence and the tactics and feints of him involved.
There is no reason to argue with Itachi's lack of stamina, as you are under the false assumption that Itachi would spamm his Mangekyo technique, what makes no sense as Itachi knows it would be ineffective. Knowing about Obito' intangibility, he would quickly develop tactics.