Hello,
I am planning to trip to Murree this weekend. It'll be my first ever when I'll be driving there, so what you guys suggest should be the average speed so I don't have to use brakes repeatedly. I've a Swift with 44,000KM used so far.
No such ideal average speed untill you can is under your control. Better to use low gear to take advantage of engine braking and avoid braking frequently while descending. Do not try to hurry.