Well, if you coming from Karachi, there are many places that you can visit. If you skipping coastal belt. Then after hub you can visit Gadani Beach and Gadani Ship breaking yard. Afterwards you can visit DAM which is near winder and is basically a fishing area.
After entering uthal you can visit Kharari, Bari Kharari, Lakhra etc. Near Bela you can visit Gondrani and some other side areas.
After Bela Comes Wadh and from Wadh to Khada Kucha area is somewhat hostile and its not advisable to travel after sunset !!
Khuzdar is not much of a tourist place. And its not worth to burn all that fuel and energy just to visit Khuzdar. If you are planning for Quetta then it surely will be a great tour.
Quetta and its surrounding have some good tourist sites. Personally i would refrain from staying for more than an hour in Wadh, Khuzdar, Kalat and Mastung.