Crystal has powers over 4 of the major elements, but Invisible Woman has formidable force powers. Not to mention that she obtained fire powers as well. I think that Invisible Woman’s force abilities will prove to be enough to take down Crystal in this round. Crystal’s elements of formidable, but not formidable enough. Invisible Woman wins.
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This contest is really a toss-up. However, Crystal is quite probably Marvel most under-rated female character. She has such a variety of powers at her disposal and this makes her one awesome foe!
Not for long if the Inhumans push continues. Marvel is really trying to get them popular so Crystal should certainly be getting some new fans. She can definitely give the Invisible woman a pretty great fight with her elemental abilities.