Fastest route JHB - Nairobi?
 

Tried this in Route Planning and received nowt, hope someone here can assist:

Having just dawdled my way down via Uganda, western Tanz and Malawi (etc) I must now, unexpectedly, return to Nairobi asap.

What is the fastest possible route from J'berg to Nairobi?

JHB - Harare - Lusaka - Tunduma crossing, then ...?? Or ...?

I'm in a Land Rover.

Thanks in advance for your assistance.
WR

JHB - Bulawayo - Vic Falls - Lusaka - serenje - mbeya - iringa - morogoro - chalinze - segera - same - moshi - Arusha - namanga - Nairobi