If you could redo the Orochimaru vs Third Hokage fight after part two what would you change or add?

Obviously the author didn't know how crazy the powers in Naruto would get. So how would you change or what would you add to the fight between Orochimaru and the third hokage in order to scale them properly to what was shown during the final arc in Naruto?

Remember the Third Hokage was the strongest of the Kages at the time which included A and Onoki.