Another thread just yesteday discussing eye watering prices 11/12 months out
Bipolar pricing - MAN to MIA
Of course, hold off booking.
Also, the A380 is an almost permanent fixture on JNB on either one or both rotations. I can’t see there being anyway it’s losing F on that route.
However with the (eventual!) overhaul and refurb of the A380 cabins F will likely be less available and so less A class …