Use whichever version you think is better, or just use the newest one. These are made to be style models, so I'm not sure how nicely they'll work with artist tags or LORAs.
3-6 cfg, Euler a
20-30 steps
Probably any normal SDXL resolution, I use 832x1152
Positive+: incredibly absurdres,
Negative: comic, panels, watermark, (worst quality, bad anatomy,:1.15), simple background,
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