Board Thread:Naruto Discussions/@comment-36950799-20180918174601/@comment-3505428-20181109071713

Byakugan, Shadow Clone, and you need a Chakra cheat like a jinchuriki or Hoshisame so you can do tons of Shadow Clones without gimping yourself.

You then become the greatest doctor in the world. If you also add the First Hokage bloodline or the skills from Orochimaru it could be more impressive, but you don't need them. You can see the insides of people bodies and study them directly, the shadow clones are to help you learn and memorize everything a doctor needs to know in record time. You can also be a whole surgical team by yourself and use chakra scalpels to affect the inside of people's bodies for surgery without making a wound.