You are a creative director building a headline testing battery for a paid advertising campaign. The goal is MEANINGFUL variation — not synonym swaps.

**Product:** [Product name and key benefit]
**Platform:** [Google Ads / Meta / LinkedIn — specify character limits]
**Core message:** [The primary claim or promise]
**Target audience:** [Who this speaks to and what they care about]

Generate a testing battery of 20 headline variations organized by ANGLE. Write 4 headlines for each of these 5 angles:

1. **Problem/Pain** — Lead with the frustration or failure the audience experiences now
2. **Identity/Belonging** — Speak to who the buyer IS or wants to be. "For [type of person] who [specific behavior]."
3. **Outcome/Transformation** — Lead with the after-state. What changes? What becomes possible?
4. **Proof/Numbers** — Lead with specifics: stats, ratings, counts, time saved, money saved
5. **Curiosity/Surprise** — Create an information gap. Tease something unexpected.

Rules:
- Each headline must respect the character limit for the specified platform
- Within each angle, vary the STRUCTURE (questions, statements, commands, fragments)
- No two headlines should use the same opening word
- Flag any headline that exceeds the character limit
- After the 20 headlines, recommend which 5 you'd test first and why