Not made by me, go show the author some love:
https://civitai.com/models/2593256/666kart?modelVersionId=2913122

Made in google colab with only T4. (It sucks)

Sampling Method: RES Solver

Schedule Type: KL Optimal

Sampling Steps: 10-15

CFG Type:

CFG-Ctrl-Zero

Frequency-Decoupled Guidance: w_low=0.5, w_high=1, FDG Pyramid Levels=7