For best outputs and usage:

Sampler: DPM++ 2M SDE Karras.

Steps: 30, cfg 6, CLIP skip 2.

VAE: none required.

Pos prompt: start it with "score_9, score_8_up, score_7_up, nsfw".

Neg prompt: "score_1, score_2, score_3, text".

Checkpoint Merge.