If you know a bit the place you wil find that both airports are at sea level, the whole route is above sea. For a roughly 50 NM leg going easbound, FL90 is a good and correct level . No high MSA in there
Correct, and which is what Nigel and myself were saying all along. As for the rest of your post ATC Watcher, you're bang on. Even though not a pilot myself I get frustrated by the idiotic reactions we often see here on this forum by people who PRETEND to be pilots and spout utter and absolute rubbish.