Cyclowax Race Wax
#1 because: dry gravel/MTB/CX riding is dominated by dry-dust contamination — scoring weights 60% on Block 2 (dry contamination) and 40% on Block 1. Cyclowax Race Wax is eligible after scenario filtering and its wear (0.005) is the lowest in the eligible set, which — given your priority weights — edges out every other eligible lube.