My Recommended configurations
VAE: none
Sampling Method: DPM++ 2M SDE Karras
Sampling steps: 30
CFG scale: 6.0
Scale: 768x1024
Upscaler: any
Hires steps: 28
Denoising Strength: 0.4
Note: In the upscaler configuration keep Hires Steps up to 30 max and denoising strength between 0.4 and 0.6 for optimal results.
For the other configuration settings you can vary as much as you want. Enjoy it 😉