I do reach out to LinkedIn profiles and some social media accounts, but I'd never use LLM-written text to do so.

You have to appear like a real human. The candidates in demand get recruiter spam all week long. If you go LLM slop canon on their inbox they're not going to respond.

Cold outreach has a low response rate. It's worth doing, but you can't rely on it. You have to go through all angles.

Typically I'd be doing a mix of my own cold outreach, public job postings, an internal company referral program, and for difficult roles a trusted external recruiter who I know is good for candidates.