Best Liposuction Method for ONLY Back of Legs?

The answer to your questions is just to find an experienced plastic surgeon that has great results with liposuction that can show you his/her results. The techniques used and equipment that is available for the most part really do not  matter. The surgeon is the pivotal part of the equation and not the method or technique. I personally prefer to use very small cannulas (3mm) and a slightly lower setting with my PAL system for tricky areas like the posterior thigh. But other surgeons might have equal or better results with a different technique. Bad liposuction is usually a result of inexperience. Avoid allowing anyone other than a board certified plastic surgeon to complete your procedure. 

liposuction can be performed effectively for the calves and the legs. Results depend on the amount of fat and skin ellasticity. patients have to be aware that massage and exercise after liposuction is very important for avoiding lumpiness.

  Liposuction of posterior thighs is a perfectly reasonable request, but the buttock and buttock crease should not be disrupted.  I suction this area most frequently during the Brazilian butt lift to give the appearance of a more rounded or more prominent buttock with better shape.