Very good point, TRJ, about the "Golden Pepperoni" run.
As far as the layout goes for "Queen Nzinga," I think that they placed the guard in the stage left tree so that (if the wall was breakable), there would be at least one avoidable guard. Every run, save two, had at least one guard that was avoidable. There were several times that the temple spirit was housed in the camera-right tree, yet the wall was breakable. In those runs, that temple spirit was the avoidable guard (or one of two avoidable guards, in some cases).