It is funny how Obito is underratedLol
This is the Real Life version of the story:
Pretend Obito is a virgin. (Never used the Rinnegan until now.)
- Obito has only heard stuff about ***. (Heard stuff about the Rinnegan)
- Never had it in his life. (Has actually only used Rinnegan in the war, but you get the point)
- May have watched a video or two, but is still a virgin. (Madara telling him about the Rinnegan)
Pretend Nagato already had ***. (Had Rinnegan his whole life.)
- Has actually had ***. (Has had Rinnegan)
- Has actually experienced it. (Knows what the Rinnegan is and what it feels like)
- Can have *** anytime he wants. (He can use it anytime he wants)
You literally did not give us a counter for Kamui. You just said "He'll Kamui him but will be forced to fight him in the dimension"... No he won't. He can just leave him there to die of starvation/thirst. Fact of the matter is, Nagato has no counter to Kamui whatsoever. Obito wins this High Difficulty.
BEST EXPLANATION EVER=D
But no you are wrong.
Obito has a time limit with his kamui and it is 5 minutes. He can't stay in his kamui dimension for more than 5 minutes , so anyone who gets kamui'd would die after 5 minutes.
Also, obito can just kamui his head instead of whole body , like what kakashi did to deidara and he still wins.