14 day JR pass or regional pass

Good evening
We are travelling to Japan at the end of March for 12 days. This is our itinerary:
30.03 Arrive Haneda airport
4 days in Tokyo
02.04 Transfer to Matsumoto for 2 days (possible day trip to Kanazawa from there)
04.04 Transfer to Kyoto for 3 days (side trips to Nara and Osaka)
07.04 Transfer to Hiroshima
09.04 Transfer to Onomichi
10.04 Transfer to Himeji
11.04 Transfer to Nikko
12.04 Transfer to Haneda airport for return flight

My question is: will it be better value to buy a Osaka-Tokyo Hokuriko Arch Pass for the first part of the holiday and then a 7 day JR Pass for the second half or a 14 day JR pass? I think the Hokuriku Arch Pass is a little cheaper but will it cover all the places we want to visit.
Also, how long would the journey be from Himeji to Nikko and from Nikko to Haneda Airport?

Thank you for your help