For best outputs:

Sampler: DPM++ SDE

Steps: around 7, cfg around 2, CLIP skip 1.

VAE: sdxl_vae.safetensors (optional)

Pos prompt: no need of big weights, optional "saturated" keyword in the end.

Neg prompt: nothing, or "epiCNegative" embedding (optional) for some bit of extra realism (included in my example runs).