MKA742....
PIC time is actually very important... regardless if it's single VFR, (there are a few companies here with Multi-engine as well)
IFR - All you need is a renewal flight
Medical - Ahhhh.... Duh... if your foreign medical expires while you're flying here, what you do is...... RENEW IT!! same as if you were flying anywhere!
Of the guys who had just left maun after flying a C206 for a couple years, 3 of them i know are now in Cathay Pacific, 3 are in Air New Zealand, and others in various other Jet or regional Multi-turbine aircraft...
In summary, If you want to come to africa, its a bloody good place to come and build some great experience, with hands on (Pilot in Command) flying that can only help you out in later life.
Cheers
206dog