Your career is too important to spend your time looking for a job on a variety of sites. If you were sick you would find the best possible doctor. You should do the same thing with your job site. There is no better job board in the world for legal professionals: LawCrossing shows you jobs from every single employer career page, job website, association website
Headhunters tend to specialize. So look in the yellow pages under Employment Agencies and/or Executive Search Firms to find recruiters/headhunters in your location who specialize in your field or industry.