If this were my doe (and I've got a few like this one) I would be looking for a buck to improve body capacity, front end assembly, and rump width.
The lack of body capacity/depth really pops out on this four year old doe. She should be much, much deeper in the body at four years. Dairy goats should be wedge-shaped, with a line slanting down from a deep chest to a deeper foreudder & belly.
The rump width is a linear trait that *usually* corralates with overall width. This doe has a somewhat narrow rump that goes along with her tubular body. She probably walks funny with a full udder, with her narrow rump and her wide udder arch.
Front end assembly-she's shallow in the chest. It looks like her elbow is about even with her chest floor. The chest floor should be well below the elbow. She has no brisket either. Her forelegs are placed too far forward. I'd like to see a more level rump too, but this isn't as important as the body/front end IMO.
She does have some really nice traits. Her rear udder arch, medial, and teat placement all look very, very nice. Her dry profile suggests that she has a good foreudder. Her legs, both rear and fore, are correct and she is well up on her pasterns. She's very dairy, especially in her neck. She also has a kind eye, and her expression says she is a sweet natured doe. I also like her color

She also looks breedy to me, but an actual Nubian breeder may have a more useful opinion.
I have some tube shaped Togg does and have made 1 generation improvements with bucks that have a lot of body capacity and rump width in their background. This doe has a good foundation and I think her faults would be easy to correct with the right buck.
Good luck!!