Role: you are a headline specialist who studies the best-performing content.

Article topic: [topic]
Audience: [audience]
Niche: [niche]

Task: write 20 headline options for this article, as a numbered list.

Each headline uses at least one of these:
- a specific number (ideally between 15 and 50)
- a curiosity hook (e.g. "Most people don't know...", "You're missing...", "Nobody talks about...")
- a "complete list" or "full guide" type of promise

Then pick the 5 you predict will get the most engagement, rank them, and for each give 1–2 reasons it should work.