Kamui is probably the most broken power in Naruto. So broken that Kishimoto had to restrict Obito from using it as soon as he became Juubi's Jinchuriki. When Kakashi obtained both of Obito's eyes with a fraction of Rikudo's Chakra, he started outperforming Kaguya when she was at her strongest, dodging her ash bones, blitzing and cutting her. Even prior to that, in the actual war, Kakashi was about to rip off Juubi's head, needing to be stopped by Obito, and that's Kakashi with average Chakra levels and lack of Uchiha bloodline. That same Kamui was able to even put a hole into the shield Madara formed from his truth seeking orbs, which are used to basically neutralize all Ninjutsu.
Forget about Susanoo, even with intangibility + long range Kamui, you are basically invincible. But on top of that you receive Susanoo with Kamui powers and powerful Genjutsu.
