After some time in this game I've noticed that now I have a plenty of SSR that I'm not using. I've got them as spooks or cause I like their design\personality, but I barely use most of them.
So I wanted to ask: is this expected and may be which are some ways to use them?
The exact list if we count them would be: Charlemagne, Mushashi, Altria, Laltria, Karna, Aesc, Anastasia, Osakabehime, Raiko, Johanna, Nitocris Alter, Summer Abigail, Arthur, Ozzy, Scherehezade, Xuanzang Sanzang, Sen-no-Rikyu.
Starting from Arthur they're not even raised yet. But the point is, is this fine and how to use them if not (or if yes too)?