L2 by definition is a derivative visa. You want her not to be dependent on you, she needs to find her own employment and change to one of the primary visas.
NYC EXPERIENCED IMMIGRATION ATTORNEYS www.myattorneyusa.com; email: email@example.com; Phone: (866) 456-8654; Fax: 212-964-0440; Cell: 212-202-0325. The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter.
A question like this requires a complete review of a candidate's educational, family and financial situation. You will not get a meaningful response on a forum. Consult with a competent immigration attorney for options, if any.
This response is general in nature and cannot be construed as legal advice, given that not enough facts are known. Any comments offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship. If you would like additional information based on this response, please contact my office at 510 657 7665 or 415 902 0832 to schedule a consultation.