Recruiters can help when you understand how they work. The right relationship is based on fit, clarity, and follow-through.
A good headhunter is not applying for jobs on your behalf the way a job seeker would. They are trying to match a specific need with a specific profile quickly and credibly. That changes how you should approach them.
Most recruiters work inside a specific discipline or market. Talk to recruiters who actually place the kind of work you do.
Your resume needs to state skills, level, tools, and domain experience in a way a recruiter can sort fast.
Strong recruiters do not win by blasting resumes everywhere. They win by narrowing quickly to a small number of solid matches.