Which JR Pass to buy?

Hi,

I saw an article about a 10day trip to Japan

I tried to follow it as much as possible and came up with this itinerary...If we use the IT below, will we be able to maximize the JR Pass? Which JR Pass should be buy? We would like to minimize cost as much as possible as there will be 6 of us travelling.

Should I still get the Icoca & Haruka and 7 day JR Pass?

If I have to choose between Hiroshima and Kobe which would you recommend?

DATE TIME ITINERARY
Day 1 04-Dec-15 Kansai Airport - Explore Osaka
Day 2 05-Dec-15 Universal Studios - Harry Potter Land
Day 3 06-Dec-15 Nara
Day 4 07-Dec-15 Travel from Kyoto to Tokyo
Day 5 08-Dec-15 Gotemba outlet shops
Day 6 09-Dec-15 Tokyo
Day 7 10-Dec-15 Tokyo-Osaka
Day 8 11-Dec-15 Hiroshima and Miyajima or kobe?
Day 9 12-Dec-15 Kyoto
Day 10 13-Dec-15 Depart from Kansai Airport

Thanks in advance for our help...