Qwen3.6 35B (3B active) Tiel-Coder

User reports 30 t/s generation on an RX 6700 XT 12GB with a Qwen3.6 35B-A3B Tiel-Coder model at Q4_K_XL, using llama.cpp with the Vulkan backend on Windows 11. Setup uses 100,000 context, Q8_0 KV cache, flash attention, 28 MoE layers offloaded to CPU, 6 threads, and MTP speculative decoding with draft-n-max 3. User is asking for advice to reach 40 t/s without changing the quant, and notes 6 threads was best out of 4, 8, and 12.