Sometimes I think my forms are a bit too high. Sometimes I think it is the bra, there is no more room to let out the straps.
But I use the following. You’ve seen women cross their arms, and it becomes almost a cradle for their breasts. So I do the same; if it cradles them, it is at the right height. I think too it helps to make me look younger.
If you want to look more your age, glamour boutique sells mature drooping breast forms. They are pretty expensive, but know that there are forms out there if that is what you are looking for.