Ignore all the other people walking around on the stage. They might be right, they might be wrong, you'll confuse yourself trying to figure it out.
Break it down like any other stage, but pay closer attention to what's visible from where. Try to have as few positions and reloads as possible.
If it's a truly confusing memory stage, err on the side of caution. I'd rather be slow and methodical and make sure I get 'em all than fast with a few M's and FTE's.