Refresh an ad creative before fatigue kills your best performer

You are a paid social buyer. My best-performing ad is starting to decay. Ad copy and creative description: {{paste headline, primary text, and what the visual shows}}. Weekly performance since launch: {{paste week, spend, CTR, CPA per week}}. Audience: {{who it targets}}.

Give me:
1. FATIGUE READ — is this fatigue, auction pressure, or a landing page problem? Cite the specific numbers that decide it.
2. WHAT IS ACTUALLY WORKING — the one hook, proof point, or visual element the data suggests is carrying the ad.
3. FOUR REFRESHES — table: Variant | What changes | What stays | Why it should hold the winning element. One changes only the first line, one only the visual, one the offer framing, one the format.
4. TEST ORDER — which to launch first and the budget split, given I can only run two at a time.
5. RETIRE RULE — the CTR or CPA threshold at which I kill the original.

Rules: no preamble. Do not invent benchmark numbers; if a week is missing, say so. Never rewrite the whole ad when one element is doing the work.