I use the premier pre made. I then add 2 cups of skim mixed with 1/3 cup of powdered. This makes a large shake, but I drink from it a couple times a day. The milk cuts the sweetness. It has been just what I needed!
I am also a light weight, when I had surgery 6/25/14 I was 200lbs the day of my surgery, Today I weight 184, that 16lbs ir 2.3lbs a week, yes its very slow but the numbers are coming down and I do feel much better.