What If Kushina Had Sealed Half Of Kurama In Minato,Naruto Could This Alive Minato With Kcm Be Able To Perfect The Rasengan And Sage Mode?

Let's say that somehow before dying kushina is able to somehow split the ninetails in half and seal one half in naruto and the other in minato so minato doesn't die.Would this alive Minato be able to perfect rasengan and sage mode and how strong could mianto become comapre to the other hokage.If he had live alot longer and how would these change the story.Lets say that obito learns that Minato surrived and as such decide to cut off the part of his back that had the flying rajin seal so that mianto can't teleport to him.

Let's say that somehow before dying kushina is able to somehow split the ninetails in half and seal one half in naruto and the other in minato so minato doesn't die.Would this alive Minato be able to perfect rasengan and sage mode and how strong could mianto become comapre to the other hokage.If he had live alot longer and how would these change the story.Lets say that obito learns that Minato surrived and as such decide to cut off the part of his back that had the flying rajin seal so that mianto can't teleport to him.