I'll be doing another reduction. Should I do scar therapy so the surgeon can have the most healed skin to work with? (photos)

Your surgeon will be cutting out the scar anyway, so it won't make much of a difference. I recommend an in-office examination as well as a detailed discussion with a surgeon who you are comfortable with. Finally, make sure your surgeon is a Board Certified Plastic Surgeon certified by the American Board of Plastic Surgery (ABPS).
Best,Dr. DesaiBeverly Hills Institute for Aesthetic Plastic SurgeryHarvard Educated, Beverly Hills & Miami Beach TrainedDouble Board-Certified, Double Fellowship-Trained Beverly Hills Plastic Surgeon

As scars mature over months to a year (from bright red to purple-y red to dull dark red), the quality of the scar usually improves.  There is almost always lightening of the scars. Silicone sheets, Mederma, and Bicorneum are reasonable and popular options. I recommend that the scar therapy begin after the scars have healed and there are no open areas, which usually takes 4 - 6 weeks.Kenneth Hughes, MD, ABPS Board Certified Plastic SurgeonLos Angeles, CA

The technique I recommend is The Bellesoma Method.  This will reduce and reshape your breast tissue creating upper pole fullness without implants, elevate them higher on the chest wall and more medial to increase your cleavage.  The weight of the breast is transferred to the underlying pectoralis major muscle resulting in pain relief and long term stability.  Vertical scars are avoided, nipple sensation and the ability to breast feed are maintained, if not injured during your previous surgery.Best Wishes,Gary Horndeski, M.D.