Any 4X4 can make the Jhal Magsi track if its gonna be driven carefully. From 4X4 perspective, its not at all technical, its does have various kinds of terrains, but nothing any stock machine would have trouble coping with. In rally all is done in 4H. The issue comes when you have to thrash your machine mostly full throttle for approx 200km. Its a very harsh terrain for high speeds for the engine, transmission, the suspension and even for the occupants who are thrown around like rag dolls if not properly belted up!
Every engine and gear box has different speeds/ ratios, my rally was done mostly in 2nd 3rd and 4th, with 3rd being used twice as often compared to remaining two (range between 68-110km for my NPP). The engine revs during the rally are frequently close to red line and I probably hit the rev limiter well over 100 times during the 200km distance. Having said that the suspension is the most taxed component in the rally with Shocks requiring the most attention as they frequently fail. Some / many of the higher end rally machines had suspension alone costing over half a million! :-#
I have said it before, all even semi-enthusiasts should definietly attend the Rallies here in Pakistan, even non participants can go and do the track on recce day to get the feel. One doesn't have to go all out, but you can certainly give burst of speeds when you want to enjoy it!
By the way quite a few Rally particpants do the recce in non-rally machine to save potentially wearing down components un-necessarily. We saw Nadi Magsi doing it on Vigo this year! There were several others as well.