Marina Del Rey Liposuction doctors

I think you need to ask your plastic surgeon this question, but in general, the flanks often respond well to liposuction particularly if you do not have stretch marks in that area.  In your situation, a tummy tuck with flank and hip liposuction is a common operation with good results.   The other thing to consider is - what are you calling "hips"?   I'm not sure it's clear from your pictures.  I recommend a second consult with a plastic surgeon if you are not getting answers to your questions because without seeing your whole body and evaluating the quality of your skin, it is hard to give advice. 

It is very hard to appreciate the quality of your skin from a photo, but just based on your description of "saggy, not tight" skin, you will likely be happier with a tummy tuck.  However, it is best to achieve your ideal body weight that you are comfortable with before considering body contouring surgery.   No cosmetic surgery is a substitute for overall weight loss and health.     You might consider liposuction first and see how the skin retracts as long as you are prepared for possibly needing a tummy tuck to remove loose skin in the future. 

Coolsculpting results take a few months to show full effect, so if you are planning on having liposuction in the same area as the coolsculpting, I would recommend waiting.  Liposuction should treat an area effectively enough and with more precision so that you do not need to "pretreat" with coolscupting.