I've gotten most of the hero/mastery points in Crystal Oasis, but as I move south into Elon Riverlands and The Desolation, I simply can't get to them. You seem to need mounts with higher levels of mastery (high vault for Springer, for example) to reach them, but to get those levels you need mastery points, which I can't get to. One mastery point in Crystal Oasis requires transport through Shifting Sands which requires Jackal mastery. Everything I try to do seems to depend on 10 other things first. I've looked online for instructions on "how to get to such-and-such mastery point" but there isn't much. Right now, I'm specifically going after the hero/mastery point at Shoals of Sovereignty. Any advice?