Take one part ass slider, one part breast slider. Mix the LoRA blocks together at roughly 50/50, like when you're making a drink and just sort of eyeball it instead of actually measuring anything. Stir until well combined. Adjust mixture strength to taste.
Let it sit for a bit. Maybe give it another stir. Add ice solid frozen water if you're fancy, or don't. The important part is that you've combined two things that probably shouldn't go together but somehow... do?
Serving suggestion: Works from -10 to 10. This is basically me throwing ingredients together to see what happens, so consider it a test batch. Might be great, might be weird, might be both. Only one way to find out.
Will affect the face based on strength, because body weight obviously also changes the face, use edit to fix. It also tends to a add a twist of glamour, for some reason.