I teach a simple philosophy when dealing with edged weapons. First of all there will be no one technique that will work, since the environment is dynamic and you must adapt to it. Most of the techniques I've seen over time are beautiful and I still enjoy practicing some of them. But would generaly be ineffective. First, you will bleed. Get that in your head and be prepared. 1. RUN 2. Cant run for some reason. EQUALIZE pick something up (extra reach is good) 3. NUTRALIZE rapid entry with the intent to drop them where they stand. There is much more to discuss on each of these items, but that is the just of it.