You can't focus the referee, as it automatically focuses on your nearest opponent.
If you want your Raging ****** to bugger off, just give him a quick jab (using just punch button) and run away. You have plenty of time. With brawlers, just grapple them.
If you're having difficulty with the old untouchable technical dude, you've basically got to be technical yourself, just run into them, time and time again ;) ( or run).
Sometimes you can counter Rampages, if you're a high flyer, fall to the floor, and use your possum. When he gets you up, you should counter (not possum pin) and you can get away. Some useful tips.
Although, I've never seen, or used Corbster's method, I have my doubts, but I'mma try it out.
England; time setters for the entire world.