36 days in Japan, Jr pass, tickets or mixed?

Hello,
I was wondering if I'd be worth purchasing the jrpass for the entirety of my 36 day Japan trip, stick with tickets or do a mixed selection after researching further.

Side note: are there any good transport/itinerary apps/websites to help plan all of this?

My trip:
Osaka-Kyoto-Nagoya-Tokyo-Sapporo
Lots of classic stops like shines and things I've seen offered on the Jr pass but between city's in my biggest worry. Places can be swapped around for convienance, still planning!

Thank you!