Sampler / Scheduler recommendations
For Turbo i am happy with:
cfg 1
steps 4-5
euler
simple / beta / sgm_uniform / linear quadratic
It requires at least two small steps in the high sigmas for composition. It nicely fills in details in a huge denoising steps just like most modern models.
I haven't found a good way to shed the overcooked HDR look. Not spending a lot of time in the mid to high sigmas helps with that. But karras doesn't manage anatomy correctly.
For the bigger default model (not base):
cfg 3
steps 20
euler_ancestral
simple / beta
I think it needs SDE (ancestral) to escape local minima during sampling. Without it you don't get clear details like eyes. Haven't seen benefit of higher cfg but might depend on the prompt.
It seems the Turbo model performs a little bit better overall.
Max quality is probably a mix of models and chained sampling. Default model for structure, details with turbo.