Final Flab :P

This is the first time posting, I have a burning question and thought maybe some other have faced the same issue. I am at the point in my fitness journey (which I finally started at 44)where I have dropped all the weight (5'7" - 128lbs) Now I am working on shaping and toning. Problem area is thighs and butt like a lot of woman. It's super jiggly....so my questions is this. I'm on my second round of MASS (absolutely love it!) Kelli and Daniel say this: Remember, even though both of us are doing 10 repetitions per exercise, you can always do more or less depending on your overall goals for this program. As we said at the beginning of this program keep your repetitions at 8 or under for mass building, 10-12 for more of a strength focus, and 14 to 20 for increasing tone for rock hard muscles. Problem is, I don't know what I should be focusing on based on my goal.

Thanks for the input