Olympus lens selection for African safari

Hi all,

I need some opinions on lenses for an upcoming safari in South Africa in a few months. It's a 2 week trip with the main focus on the game parks . Kruger etc.

This is what i have currently.
35mm macro. 12-60 , 9-18, 50-200 swd and the 2 TC's

Due to luggage restrictions and the fact that i am not a mule, i would like to restrict my selection to only 2 lenses and 1 body.

1. The 12-60 is a must i think. The 9-18 is a bit wider but not that much. So i can leave that at home.

2. The 50-200 SWD

This is the biggest issue. A very good lens, but with the TC's a bit less sharp then i would like.
Would buying a used 90-250f2.8 be a good alternative ?

Africa has normally good light conditions, so is it worthwhile to invest in the faster and longer 90-250 ? .

And what about the range Is 200x2.0TC = 400 = 800 f7.0 EFL sufficient given that one cannot leave the car in the parks. Or the 1000mm with 90-250 a must ?
And what about low light conditions in the morning and evening ?
Can that be handled with the 50-200 or 12-60 ?

Any advice is appreciated . Specially on the 50-200 vs 90-250.

Choices to be made...

Howard