We have EMH on our AK day. And we got a FP for the Kilimanjro ride at 9:55. IF this is the first thing we really want to do when we get at the park as it being cooler and animals might be happier in the early morning. Do you really need a FP? This FP thing is entirely different than when we went 7 years ago.
Yes, get the fast pass and if by some miracle there is no line modify the FP right before you get into the stand by line for another attraction. You need to have at least 3 fast passes a day- more is better!
"Usually" if you get there right at RD, you can mostly walk onto KS (especially now with everyone trying to RD in Pandora).