Kakashi blitzed Kaguya with Rikudo enhanced speed + Kamui phasing + Raikiri combo'd in the Kamui Raikiri that slashed her arm before she could even react, keep on mind that Minato wasn't able to react to Juubito and Juudara who are slower and weaker compared to Kaguya. Kakashi can use Kamui to teleport himself at maximized speed, having both eyes' power, basically a seal less Hiraishin to make unpredictable attacks with Kamui Raikiri, Kamui space-time barrier or creating PS and launching Kamui Shuriken or Rikudo enhanced PS slashes; he can use Kamui intangibility and there's the Kamui GG, his space-time barrier is unstoppable and uncounterable: he has a chakra source to spam it and to make giant dimensional holes and it's execution is faster than BSM Rikudo Senjutsu Naruto's movement speed and even than Kaguya's S/T portal that blitzed Rinnegan Sasuke, and was still warped away by Kakashi before it even managed to completely open. BM avatar is useless, Hiraishin can be fooled with smartness and better hax... Kakashi blitzes Minato with Kamui Raikiri, warps away him in an instant, teleports behind himself and goes with Kamui Raikiri or Kamui GG while Minato cannot do anything, spams Kamui Shuriken, attacks with Perfect Susanoo... he is simply on another level.
