A friend and I were running around through the map, checking out all the different points, chokes, and flanks. Everything was just fine until we started exploring jump opportunities (which there are a lot of!). As it turns out, the second of the obolisks in the middle-ish point has a bit of a clipping issue. I believe it's because of the little chipped bit off the side of the structure. It's not the biggest, I believe only a few pixels big, but I found a way to get the clip concistently. As a soldier, rocket jump up towards the middle line of the obolisk, and aim for the gibbus rune halfway up, if you grind up right against it, and line up with the middle line, you should get the clip. From here, you can pretty much rain rockets down from the high ground.

Cheers!