Re: [Nutaku] Kamihime Project R
They have specific abilities that may come in handy later. Although once you start racking up SSRs the damage output increase means it's not worth it to switch up your team most of the time. SSRs are pretty much permanent party members (unless you're one of those lucky bastards with more than 6 SSRs in one element, in which case fuck you).
My Darkness team has 4 SSRs (Satan, Amon, Thanatos, Osiris), Lightning has 3 (Tyr (awakened), Thor, Athena) and same with Water (Nike (awakened), Shiva, Ea). And no, I haven't spent a lot of money on gacha, to those who are wondering. This is my DMM account which I've had since launch.
Word of advice, save up some of your gems for events with limited access kamihime. There's the Koihime Musou event coming up, after that there's the halloween event and then the christmas event.
Then the Walkure Romance event and the the current summer event. I've only gotten 2 event only kamihime and they're from the current summer swimsuit event Boreas SR (water) and Ignis R (lightning).