I can't help you about the hair, but for breasts, you can use something like this (listed for both G2F and G3F, as I didn't know which figure you are using):
You were absolutely help. Breast jiggle can be done with puppeteer animation layer, using premade poses of the shapes.
Hair.. I might use the physics simulator plug.
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I can't help you about the hair, but for breasts, you can use something like this (listed for both G2F and G3F, as I didn't know which figure you are using):