AdMob Mediation & Yield Optimization for 5-Game Arcade App (No Coding)

Job ID: 40171653

Budget: ₹600 – ₹1,500 INR

I have a mobile game app with 5 distinct game modes (Ludo, Tetris, Sudoku, Wordsearch, Jigsaw). My current AdMob Match Rate is low (~34%), and I need an expert to fix my fill rate and revenue without touching the code.
The Setup:
Ad Units: I have separate Ad Units for Rewards/Interstitials for different games.
Constraint: You will NOT get access to the source code. You must work entirely within the AdMob Dashboard.
Your Tasks:
Fix Match Rate: It is currently bleeding revenue. Implement Mediation Groups (Unity, Meta, etc.) to ensure 90%+ fill rate.
Granular Optimization: Set specific eCPM floors for "High Duration" games (Sudoku) vs "Fast" games (Ludo).
Audit: Verify that my ad unit mapping is correct and identify any policy risks.
To Apply: Tell me one specific strategy you use to optimize eCPM for a multi-game app vs a single game app.