I have 32GB of RAM with 16GB VRAM and I haven't had a lot of luck running larger models like this. Are you able to expand on that?
But this could be done with just llama-server normally. I don't use any special command, just ensure that it's using the GPU. I've found the default fitting to be good.
From memory:
llama-server -m models/Qwen3.6-35B-A3B-UD-Q4_K_XL.gguf -fa on -c 128000