Event Prep Vault converts saved inventory into an Alliance Duel plan. 1. Open Strategy Hub and find Event Prep Vault. 2. Enter the event items you currently have saved. 3. Choose the planning multiplier that matches the chest target or matchup. 4. Review which Duel day uses each item and the estimated scoring opportunity. 5. Save the inventory after every major spending day. Do not enter ordinary resources that are not part of the listed scoring actions. Always confirm the point values shown on your live server.