This is a basic Work flow using the WildCardX-XL Fantasy model https://civitai.com/models/469297?modelVersionId=522165

This workflow contains Notes on each section. Used https://comfyanonymous.github.io/ComfyUI_examples/sdturbo/ and https://github.com/wyrde/wyrde-comfyui-workflows/tree/main/basics/building-up to Learn Comfy UI

This workflow contains notes in each section, with the model authors recommend settings.

The VAELoader node and sdxl_vae.safetensors is not actually used. They are there if you want to use am external VAE.

If you want to use an Upscaler

Hires upscaler: ESRGAN_4x,Lanczos, any of your favorite upscaler.

Also Found that this does give good results without using the sdxl refiner, possible more detials try for yourself