Should I consider a lift after downsizing 100cc's? (photos)

Let's be clear. The first photo showing your entire torso from the lateral perspective reveals a nipple areolar complex that is below the horizontal meridian, and pointing down. For many women with breast implants, this is acceptable, and for those women I wholeheartedly agree that no surgery is necessary. However, some women want a nipple that sits at or slightly above the horizontal meridian, and pointing straight ahead or slightly up, similar to an objectively idealized breast shape. Your implant downsize will have a slightly negative impact on nipple position, but not as much as you would think. If you decide to also perform a lift, a circumareolar type would be wrong for you. Your nipple areolar complex objectively needs to travel a distance roughly equal to its diameter higher on the mound, something that could never be accomplished with that lift. Worse, by trying to 'push the lift to its limits', you will get all the usual problems associated with that lift: wide and irregularly shaped areola, pleating, thick scarring, flattening of the mound, and persistent breast sagging. To get a truly effective lift, you would need a full mastopexy with the associated vertical incision. I'm aware of your skin type, but done well, it would be virtually inconspicuous with proper execution and care after surgery.

I think a luft would be necessary if you downsize. However as far as implant size I would suggest around 250cc