Also, is Spinel realy a good candidate? I mean, she was realy only a threat because she was useing Diamond Gem tech (i.e. the Gem destabiliser and the injector). Granted she did put up a fight during "Other Friends" but that was only because the others where "rusty", and was only able to poof them because of the Gem destabiliser. If it weren't for her Gem destabiliser, the Crystal Gems would have poofed her the moment they got their act together.