Board Thread:Naruto Discussions/@comment-24898250-20140730025315/@comment-3038994-20140805200304

JOA20 wrote: General Awesomo wrote: I could see it happening. Most likely, Kakashi probably doesn't need to input as much lightning chakra into the Rasengan as compared to Lightning Cutter, where the whole technique is solely nature transformation.

Not having the Sharingan anymore wouldn't increase his chakra pool, but it would free up a lot of it for other uses.

Overall, if Kakashi sans Sharingan still wants to be a contender, he's going to have to actually showcase his 1,000 jutsus. Wait, wait. Even base Naruto, who has four times the amount of chakra Kakashi has, can't do more than three Rasenshuriken before getting exhausted. It's true that Chidori/Raikiri+Sharingan requires quite some chakra, but just more than the base Rasengan, and Kakashi could do it up to six times for day. The elemental Rasengan might require almost all of Kakashi's full chakra reserves. Maybe. Stranger things have happened, like the how the number of times Kakashi could do Lightning Cutter and Kamui increased, outside of the time skip.

Specifics aside, and in my own opinion, it would be a nice choice for Kakashi to master Lightning Release: Rasengan. It would show the most growth out of him. Conquering the obstacle that he couldn't before to achieve new strength.