When I used to roll....one of my game plans every day was to NOT get submitted. I wanted every match to last until the instructor said to "switch" and go with somebody else. (my plan did not always work)
I didn't have to try and start in bottom position, I seemed to get there every time quite naturally. (rag dolled, lightweight)
But both grappling and stand up (which I prefer) had the exact same primary game plan, which I swear to until this day - when he moves, I move. I may get caught, but it will never be doing nothing, waiting in the position he thinks I'm going to be in.
So far, so good.