Board Thread:Versus Debates/@comment-26182227-20150308115258/@comment-734582-20150530140741

Riptide240 wrote: You're forgetting that Minato has faced Kamui before. Considering the level they would fight on, Susanoo is something not even worth trying IMHO.

He won versus single-eye Kamui and won, but was already caught in it. Double eye works twice as fast, so there's a real possibility Kakashi can Kamui him. Considering the speed of Raijin and the improved speed of Kamui (as well as the ability to project it, which Tobi lacked), not a whole lot would be needed to buy an extra second for Kamui. After all, it would require immense concentration and spatial awareness to use Raijin like Minato does. I don't think there's much tolerance for error on Raijin at all, give the timeframes involved. Kakashi would only need a similar timeframe (given the Tobi-minato fight) to trap him. With Lightning techniques like seal-less Chidori and Kunai, his Genjutsu, Earth Style: Hiding, Shadow Clone and perhaps one of his other many (copied) techniques, he could be able to stretch the timeframe enough that it works.

Once more, both Kamui and Raijin only need seconds. A hesitation, an evasion, a thought of Minato can be enough to Kamui him. Similarly, the very same things are enough to Rasengan Kakashi. On second thought, it's probably not even a matter of stamina. Whoever strikes first, wins. The battle can literally be over in a second.

I don't think Susanoo will work. Considering how it works, there may actually be enough space for Minato to just Raijin something (a bomb, a kunai, rasengan) into it. I wouldn't consider it reliable.

Mangekyou allows extreme reactive capacity, and high-speed assessment. Enough, judging by Madara and Tobi, to see through Raijin, maybe even predict it. Any teleport puts Minato at a risk, any attack puts Kakashi at a risk. However, it's clear that Kamui-intangibility works really, really fast (on the order of Raijin itself) so it's also not a case of an eternal staredown until Kakashi's Kamui wears off.

So in conclusion, they're probably the two most evenly matched shinobi. Especially since actual power levels don't matter for Kamui (just size). Though i must add: in the event that Raijin allows transport from the Kamui dimension to a kunai in the main dimension, or vice-versa, Kakashi will be put at a massive disadvantage.