SU-30
Bring back their Cheetah fighters, it was the best one they made and were on the par of the F-15E by some accounts.
These fancy planes are only as good as the pilots.
They’ll buy these new toys. But will they be able to maintain them? Sub-Saharan Africa (except for South Africa) has a poor track record here. Maybe Angola can entice some Cuban aircraft mechanics to come back. But they won’t be bringing any spare parts along.
You wanna know who has “air superiority” in Southern Africa?
Find out the number of monthly average hours of flight time for training for the combat pilots of each nation. The one with the most hours of flight training per pilot per month probably has air superiority, even if they’re flying SPAD XIIIs.