Board Thread:Versus Debates/@comment-34277398-20190315034807/@comment-9782468-20190426000404

You implied Minato's senjutsu Rasengan was weak, which would only be the case if his senjutsu was weaker than Naruto's. It's not. Minato just can't last as long.

Kakashi not clearly referring to the Rasengan. You're just pulling things out of thin air. All he noted was Minato's Senjutsu, not the attack.

Lol are you serious? The Rasengan tore him his clothes and skin up, ye you're like "no actual damage." Do you hear yourself? And then Minato's wondering how he even survived the attack, and Kakashi noted he warped the Rasengan away before it did more damage.

Minato explained Minato's Sage Mode, confirming Kakashi's assumption. You're right. However, nothing out of either of their mouths implies that Minato's Rasengan was weak. Their interaction just confirmed that Minato could not maintain Sage Mode very long