Who to use 7* mutant AG on?

I pulled a 7* mutant gem. I just pulled dazzler and have liked her, but I know I will use all 3. Who benefits more?

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Let me ask you this how else would you awaken Mr sinister? There’s your answer

Let me ask you this how else would you awaken Mr sinister? There’s your answer

This

sinister. I haven't even looked at the options, I js read the title