>>3017338
It's bordering on /d/ territory, you should ask there as well. I haven't used NAI since v3 so these might all be wrong. Did they keep tag autocomplete in v4.5? If so you should already know to use the proper gigantic_breasts instead of giant_breasts, and similar for the slimness tags anorexic should be changed to emaciated, skinny_female should just be skinny, etc.

huge_breasts is low on the size scale and would conflict with gigantic or hyper if you included them, giving you a size compromise. Neg sagging breasts, obviously. There's also perky breasts, which does counteract sag but also add nipples pointed upwards. For slimness your main driver should be skinny, add emphasis if you need to. Thin_waist can end up making her ass/hips and chest wider instead, to emphasize the waist being thin.

Also most of these tags work like offsets from the artists's usual style of drawing characters. Helps to use a style that already does what you want to some degree.
On local I can use a silicone tits lora from photorealism, as long as it's well trained to minimize style impact. Not sure how difficult the style is to separate when using the newer vibe transfer.
Finally, you could always adjust the finished image with photoshop's liquify tool or whatever, then img2img to hide the roughness of the edits.