Qwen 3.8 27B on Strix Halo: 18 t/s With MTP, Nearly 2x the Baseline

Qwen 3.8 27B hits 18 t/s via MTP speculative decoding on Strix Halo, up from 9.6 t/s baseline. The winning config uses vulkan-radv, draft-n-max 2, and froggeric's fixed template for proper cache preservation.