What pass to choose

Hi,

I need a bit more advice on what pass to choose,

we will be doing those travels : in 4 to 6 days

Kansai airport Osaka round way
Kinosakionsen Osaka round way
Hijemi Osaka round way
and Okayama Osaka round way

I'll also be moving in Osaka

I want to make sure I'm choosing the right pass,
I want to be able to make reservation of seats ONLINE because I'll be travelling during golden week

Thank you