I would, hear me out: With you having the strongest cosmic champs awakened already (sans Medusa) I'd say go for it. Even if you do pull Medusa or Venom, etc... You still have a chance to dupe them naturally whereas Thor can't be duped naturally. He's only in specific crystals. Note: he's also in this rotation of dungeon crystals. Maybe roll that to see if you dupe him, and if not you have your answer.
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With you having the strongest cosmic champs awakened already (sans Medusa) I'd say go for it.
Even if you do pull Medusa or Venom, etc... You still have a chance to dupe them naturally whereas Thor can't be duped naturally. He's only in specific crystals.
Note: he's also in this rotation of dungeon crystals. Maybe roll that to see if you dupe him, and if not you have your answer.