Ulric,
I'm not a T7 expert, but...
FWIW we used to fly much earlier aircraft between Kano and Jeddah using a single course (C) of 072 or 252 for some 7 hours, on Hadj flights. This was a "Modified Lamberdrome" route, ie. a straight line on a Lambert's projection, between the Standard Parrallels. This gave us a Base leg at Jeddah and very long Finals at Kano.
Following ONE then TWO engines shut down... Others may have more ideas for the 100 -ish mile descent's heading.
This flight from KL would have expected sunrise on the Starboard, ( right) side. NOT the Port ( left).
Something similar, with sunrise in the wrong direction, had happened to G-ALDN, the " Hermes in the Desert", 60 odd years ago.