Nice thread, thanks.
One piece of advice for people. There are tons more spots in these loops. For example, in the mars video, the cabal base on the top right of zone has another "cave" insider the building with a separate spawn. The Vex cave had spawn next to it and on top, and there are 2 or 3 other chests on the loop i find regularly. The top left cave has a separate spawn right outside of it on the left (behind rock ledge)
Take your time on the loops, always grab collection bounties from beacons (triangles and cross bones) and kill spawn as you go. Good rep, drops and mats.