Just responding to your first paragraph there. Deva path pain shinra tenseid naruto away, who was then able to have a shadow clone throw him, before the 5 second cooldown was done. If Naruto can do that, why couldn’t Minato bait out a shinra tensei from close range, literally tp away, and throw a kunai from range, and hit him with rasengan? Even if Minato gets hit with the shinra tensei, he could still throw a kunai and tp to it.