Email Subject Line A/B Test Generator

I'm sending an email to {{buyer_persona}} about {{email_topic}}. My goal is {{conversion_goal}}.

Generate 5 subject line variations:
1. One curiosity-driven (creates intrigue without clickbait)
2. One data/stat-driven (opens with a number or finding)
3. One urgency/scarcity-driven (time-sensitive or limited)
4. One personalized/relevant (references their company, industry, or role)
5. One problem-centric (addresses their pain directly)

For each, explain why it might work with {{buyer_persona}} and note the expected open rate lift (based on industry benchmarks).