Another rank up quandary

I had no mutant 7 stars so of course I pulled a mutant 2-3 gem. So I chose two mutant selectors and pulled Stryfe and Sauron. Are either of them worth it? Or should I hold onto it?
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Mutant is definitely my weakest class. I do have Dani Moonstar and I think she could be worth investing, once I am done grinding for units and take the time to learn her