Even if he stops him from warping him then...how will he defeat him?
I guess you don't read. One final time now...
Okay lets play along with the "Obito simply warps Itachi and its game over" argument.
So lets say Obito is about to warp Itachi. It has been proven to take about 2-3 seconds to fully warp someone, Danzous 2 body guards for example.
It takes less then a thousandth of a second for Itachi to activate susanoo.
Considering Obito needs to be tangible, near itachi, and 2-3 seconds to warp him, Itachi can activate susanoo within a blink of an eye, with the totsuka blade sta.bbing through Obitos body
You said that it should take Itachi 3 seconds but you said previously that Tobi warped Danzo's goons in 2-3 seconds, so Itachi would be sucked in before Full Susanoo ever comes out so he will have to opt for manifesting the Incomplete Susanoo, but if he doesn't that he can't hurt Tobi.
Wrong. I said if takes less then a thousandth of a second to activate just rib cage susanoo (Going back to your comment on Itachi didn't activate full susanoo vs. Kirin [No proof you are right] ) it still leaves 3 seconds to activate full susanoo. And it will take a lot longer then 3 seconds to warp a rib cage susanoo anyways.