You seems a Soldier and recently posted to Quetta or vice versa
I had been on this road many times. I will rank it the most safest road of Balochistan nowadays .... But still I recommend you to TRAVEL DURING DAY TIME.
Route is QUETTA to KUCHLAK to KHANOZAI to MUSLIMBAGH to KILLA SAIFULLAH to LORALAI to MEKHTAR to RAKNI to FORT MONRU to DERA GHAZI KHAN.
It took me 6 hours to reach Quetta till Fort Monru in Hilux Vigo Shape
Well Road condition from Quetta to Killa Saifullah is best in condition (Takes 2 hours) ............. Killa Saifullah to till Loralai Road condition is fine but some portions are 12 feet wide which is difficult while crossing/overtaking other cars (Takes 1 hour) ............ From Loralai onwards road is so so but before Mekhtar road is totally graveled road but it gets metaled soon till Rakni (Takes 3 hours) ............ Fort Monru till DG Khan road is good (Takes 2.5 hours)