14 Days.. Which pass?

Hi I was looking for some help with deciding on my rail pass. Im not sure if I benefit more from a 7 day pass or a 14 day pass.
I arrive in toyko and will stay 4 days, I believe I could use a local pass for this? and I hope to make a day trip to Nikko also from toyko during these days.
I then want to travel to Kyoto. I will spend 5 days here. And will include a trip to Nara, an evening in Oskara and an evening maybe in Kobe.
Then onto Hiroshima for an night and an night on Miyjama Island.
I will travel back to Hakone for one night and from here back to Tokyo.
Can you give me any recommendations on which pass benefits me most? or if you think I need to amend some of my itinery.
Thank you .