This is a simple regrouping of base flux.1 schnell and dev samplers based on the fp8 prebaked release suggested in ComfyUI Flux.1 examples page, there is a single simple node providing all available sampling configurations and outputting both an image and a latent image, this way it is easier and quicker to do fast prototyping on schnell and then add details with dev on a lower-end system.

a full latent image after 4 schnell iterations can be processed with as few as 4 dev iterations to get a nice result in dev keeping the original composition, you can also add in an upscale node to perform upscaling on a processed image with fewer extra steps