Hi, youre talking about oneof my pet subjects - dreams :)
As you say, dreams can be an indication of your subconscious, but if any meaning is to be found, you are the one to find it. Although it is apparent that R is having an overbearing and bullying effect on you, it also seems you have the strength to face him alone. Dreams are so personal, yet recurring themes, objects, events etc can have similar meanings from one person to the next. May I suggest you not take too close a view of them and concentrate more on your conscious feelings?
I experienced such an employer in my last job and stood up to him and his cronies. It was tough but I just didn`t allow them to see they were having any effect on me. Eventually I got what I wanted - an end to my contract! I was offered an honourable way out, I think only because they felt they couldn`t beat me into their ways. I heard some time later that he had been moved to head office where his activities could be monitored. I, on the other hand, went on to live out my dreams (sorry for the pun!) and am enjoying my life much more than those I left behind.
Good luck and continue to face the bully!
Mike.