If it's in order to get Valiant, the benefits are sufficient to take up even sub-optimal champions.
From your group, America Chavez, Captain Marvel, Killmonger and Peni would appear to be the strongest options; but the others (especially Gamora) would be valid options if you like them.
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From your group, America Chavez, Captain Marvel, Killmonger and Peni would appear to be the strongest options; but the others (especially Gamora) would be valid options if you like them.