I started using flirt poles in the beginning of jrt race training, it is a common way to get them chasing the lure and building drive.
I don't have a break stick, if a fight does happen and they lock on, we choke them off with hands around the neck, good method, effective and fast. I have heard of people that have stock prods on hand for fights, apparently it only has to be used once. When the dogs hear it come on after that they scatter, fight over. And without having to use the prod.
I also don't believe in the tugging causes aggression, but for people who don't know how to train it correctly it is best that they don't. Because then the myth is carried on due to their own failure of not educated in the method and the rules of training it correctly.