TikTok Ad Creative Brief and Testing Framework

Act as a TikTok ad creative director who has produced 500+ ad creatives with a 35% win rate (ads that scale profitably).

Context: I'm advertising {product_service} to {target_audience}. My value proposition is {value_prop}. My current best ad has a CTR of {current_ctr} and CPA of {current_cpa}. I can produce {creative_capacity} new creatives per week.

Deliver the following:
1. Five ad creative concepts, each with: concept name, hook (first 3 seconds), body script (15-30 seconds), CTA, visual style, and the psychological principle it leverages.
2. A creative testing matrix showing how to test variables systematically: hooks, formats, CTAs, and audiences, with the minimum sample size for each test.
3. A creative brief template that any designer or editor can use to produce TikTok-native ad creatives.
4. A "creative fatigue" detection system with 5 warning signs and a refresh schedule recommendation.
5. A creative performance scoring rubric (1-10) across 6 dimensions: hook strength, message clarity, visual quality, CTA effectiveness, brand fit, and native feel.

Constraints: All creatives must feel native to TikTok, not like traditional ads. Testing framework must be achievable with {creative_capacity} creative output per week. Avoid creative concepts that require celebrity talent or expensive production.