susanoo cannot counter the warp end of as it is ilogical unless someone can give a realistic scenario of how the susanoo could counter though the jutsu would be warping away chakra
PS=Perfect Susanoo. Susanoo takes a long time to activate? I guess you didn't see when Itachi blocked lightning with it. Or when Sasuke defended against Raikages attacks.
I don't think Tobi can warp Susanoo that's a little far fetched for me.
I think this is debatable. Because Minato, with his reflexes, only barely managed a FTG after he was alerted of Tobi's presence and was on guard. If Tobi pops up and immediately begins warping (such as with Torune) it'd be really hard to process the situation and react in time (IMO).
It depends if they know about Tobi's technique or not (and Izanagi if it comes to that). If they used partial transformation with knowledge like this:
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It could act as an extra appendage for them to use. If it's the way other people are describing it than an Uchiha might be able to stop it but not just by just sitting in Susano'o or anything.
, even if Madara manages to activate Susanoo, it doesn't cover his lower torso and below, so Tobi is safe doing what he did with Fu (from the ground). Maybe even doing what he did with Torune would work seeing that there's a decent amount of space between Madara and the ribs.
Hell, only the the upper ribs managed to form for that Rasengan. I don't think he'd manage anymore than a few ribs for Tobi's warp anyway...and this is when Madara saw Rasengan coming (a lot more predictable and easier to block/dodge than Tobi's warping)