You do not say which building, Jambo or Kidani, the reservation is in. At AKV, you cannot make a request to be in another "building" than the particular one you have reserved. The requests you list would indicate you have Kidani because (a) all standard and savanna view rooms at Jambo are on the fifth floor and thus it is pointless to request high floor, and (b) Kidani has a community hall, Jambo does not. Assuming you have Kidani, then I would recommend that your lead request be a view of Sunset savanna, the large savanna that has giraffes and zebras (the smaller Pembe does not). More than 80% of the savanna view rooms at Kidani overlook Sunset, and thus chances of having that request granted are high.
Your second listed request should not be high (or low) floor because requests are considered and granted in the order given and next to getting Sunset savanna view, the most important request to make is one for an area location in the building. The Kidani building is, from end to end, close to 2/3 mile long, meaning if you get a room anywhere near the end of one of the two wings, your walks to the pool, lobby, restaurants, store and bus station can be forever.
As to an area request, if you want to be near community hall, I would recommend requesting a room near the Timon elevator. That elevator on the south wing (front entrance of Kidani faces west) provides a short trip to the bus station and a reasonable distance to lobby, community hall (which is right next to lobby) and the pool (on the north wing). I would not request to be near Community Hall because that is essentially the same as requesting near the lobby. If you get that request granted it is fine. But the the problem with a near lobby request is that large numbers make that request and many do not get it because of the excess requests for it, and if a location request cannot be met, they just stick in any available room, which at Kidani is often one far from everything. Note, if you would rather be close to the pool and a similar reasonable distance to the lobby and the bus station, then request near the Rafiki elevator, which is on the north wing.
Third request, if you want to make one (we never do) could be high floor for more panoramic view or low floor for more direct view of the animals (many prefer the latter but we are fine with either).
Any requests should go through MS and you should then not use the area request page provided in the online check-in system. Doing so will wipe out any requests made through MS and the requests listed on that online page border on the ridiculous, e.g., at Kidani you can request near "an elevator." There are three elevators located along each of the two wings, and unless you can actually name the elevator you want in making the request, like Timon or Rafiki, a near elevator request can be met by putting you in any room in the building.