Responding to some of the questions above:
1. If room is of any importance in a 1BR or 2BR, Kidani wins hands down over Jambo. Those Kidani rooms are 100 sq ft larger than Jambo, have the extra bathroom and if you get a 2BR dedicated you will have one long balcony running across all three rooms (the lock-offs at Jambo and Kidani divide the studio from the 1BR by a wall on the balcony).
2. If you have savanna view at Kidani, my recommended requests are overlooking Sunset Savanna (more than 80% of all savanna view rooms) and either close to the Rafiki elevator (on the north wing and provides shortest access from the building to a gate to the pool), or close to the Timon elevator (on the south wing and is close to the door on the second floor that goes directly to the bus station). Either request, if met, would also leave you within striking distance of the lobby and any amenities. Do not request close to lobby. It is the request most made, and thus most denied, with the result that you can end up near the end of one of the wings, 1/3 mile from any amenities.
3. As to choosing savanna or standard view, savanna view is definitely better but you have some considerations. If going only two nights, what are your probable plans? If you intend to go to the parks early and stay until dark, then savanna view is not likely worth the points because you have a significant risk of seeing no animals. In other words, you need to be intending to spend some real time in the rooms during daylight hours for the higher cost of savanna view to make sense.
4. Also, if saving points is a primary concern but you still want to try for savanna view, be aware there are a number of rooms overlooking the Pembe savanna (you see animals but no giraffes) that are standard view rooms that were converted from savanna view. To get one while reserving standard view, request room near the Pumba elevator (last elevator on north wing; no other request needed). Just be aware that if you succeed in getting it, you will have very long walks to lobby and bus station and a long walk to pool.