User blog comment:FairyRaven/Fairy Tail Chapter 360:The White Inheritance, Review and Commentary/@comment-24066070-20131115194948/@comment-5268982-20131115211241

I think it was clearly stated in Lucy's fight against Flare, both in anime and in manga, that Gemini cannot turn to powerhouses like Laxus or Erza, because the original Mage's Magical power has to be close to Lucy's. However, if Jackal is already worn-out and Gemini touches him, then I guess this could work.