>>8839245024 steps, CFG 6.0, dmpp_2m_sde, sgm_uniform
positives: masterpiece, best quality, absurdres, simple background, plus a bunch of artist tags with different weights
negatives: worst quality, bad, low quality, lowres, flat color, flat shading, monochrome, limited palette, anime screencap
Having a couple of artists with at least 300 tags makes the biggest quality difference. Also forget about backgrounds for now, picrel is the best it can do I think and it seems to degrade the quality a fair bit.