I've done some work to convert Krea2 to GGUFs. It should come in handy for GPUs with <8GB VRAM.

Get the GGUF loader nodes from here: https://github.com/molbal/ComfyUI-GGUF

Get the converted models from here: https://huggingface.co/molbal/krea2-gguf

Q4_0 uses 7573MB on my GPU, but GGUFs are generally easier to offload if you have less VRAM.