The EmSculpt Neo is the best non-surgical treatment for fat elimination. It is the world's first and only technology that uses Radiofrequency and HIFEM+ (high intensity electromagnetic field) to get rid of unwanted fat and build muscle at the same time. From your picture, it looks like you would be a great candidate for this treatment.
Yes, VI Peels are good for all skin types and sensitivity levels. These peels are great to treat hyperpigmentation, fine lines and wrinkles and overall tone and texture. It looks like you would be a great candidate for this treatment and would love the results!
Both Radiesse and Sculptra have the ability to create lumps, so there is no guarantee when using any type of filler. I prefer Sculptra over Radiesse for the neck because I believe that collagen production greatly benefits the crepeyness often found in this area. Also if other procedures are performed in conjunction, i.e. Radio Frequency (RF) micro-needling, or fractional CO2 erbium, this will work synergistically and not cause degradation of the product.