Descending from Uhuru Peak

Descending Mount Kilimanjaro from Uhuru Peak has simple rules: those ascending Kilimanjaro from the south or west (Machame, Umbwe, Lemosho, Northern Circuit or Shira routes) must take as their descent route the Mweka trail; whereas if you have climbed the mountain from the east or north (Marangu or Rongai/Loitokitok trails) you must descend by the Marangu Route.
Those trekkers who wish to deviate from these rules should first seek permission from KINAPA. Before doing so, bear in mind that the choice of different ascent/descent combinations is somewhat restricted by the limits of your porters.
For example, one attractive and seemingly possible combination would be to climb to the summit from the west, starting off from the Arrow Glacier Camp and ascending via the Western Breach, and then descend via the Marangu Route from Gillman’s Point to the Kibo Huts – thereby allowing you to walk along all of the southern half of the summit (assuming, of course, you make it to the top in the first place).
Unfortunately, while it will take you just one night and a bit of the next morning to complete this walk and reach the Kibo Huts, for the porters, who do not climb to the summit but circumambulate Kibo instead, it would take a couple of days.
That doesn’t mean to say that such a route is impossible, for there are always porters who will willingly undertake such a walk and make it in time to meet you at the Kibo Huts, just as there are trekking agencies willing to organize such an endeavour – but be prepared to pay a considerable premium to realize such a plan.