Which procedure would help me achieve fuller breasts while avoiding a lift? (photos)

Due to the procedures you have previously undergone, sagging has developed in your breasts. The gold standard treatment for this sagging is breast lift and implant surgery. However, if you do not want implants or scars, the most natural option would be fat transfer to the breasts, done in two sessions.

From the submitted photos a lift should be performed along with an augmentation for the best result. If you proceed with an augmentation alone you could have less than optimal results such as the waterfall effect or simply larger, sagging breasts. An augmentation does not really lift the breasts.