Documentation can now be found HERE
This is a semi-basic ComfyUI workflow I use for 21:9 upscales.
This workflow is LCM ready straight out of the box, make sure you are on the latest update from efficiencynodes.
Efficiency lora stacker
Watermarked image saver
YMC image save set for dated folders
CivitAI metadata handler.
Previews for each step in the process.