I trained this model long time ago. My computer doesn't allow me to train more advanced model anyway.

Base model: majicmix realistic (i forgot it is v6 or v7)

sample size : 512*??0

Lora strength:0.7-0.9

Recommended: Lora strength in adetailer: 0.8

Denoising strength: 0.55

In my opinion, by using adetailer to swap faces by adding this lora is the best way to use it. Especially it can solve the issue of bad atanomy or face if you want full body image.