4-5 bit quants would probably fit pretty well on your rig. Check HuggingFace for Qwen3.6-35B-A3B-MTP-GGUF [1]. They've also got a cool UI thing these days to help indicate which quants of a model will run on your hardware.

Full octane isn't gonna fit on much of anything south of a 128GB machine once adding KV cache.

[1]: https://huggingface.co/unsloth/Qwen3.6-35B-A3B-MTP-GGUF