Take silky skin, clean metabolism, dietware & (if desired) a penile vaginal implant.
Regardless of whether you do or not, you'll still be a large, bulky, metahuman - the difference would be less fat / greater muscle definition, smoother skin, less body odour and .. well, I think you can guess about the last one.
You could forget the dietware and take False Front // mimic option, then learn how to create your own digital body images as desired - up to 20% more or less apparent mass, by memory.
That's most of your cosmetic 'ware needs taken care of, and you just need to decide whether or not you need some actual body sculpting. (realigning facial bones, horn shaving, etc)
If you do choose less weight, though, it would probably make troll dermal deposits stand out more. (not to mention how difficult hard lumps of nail or bone could make some situations ...)