I've never played CoW because he lives in the middle of nowhere, but yeah, I hear he's quite good, and is in general a very knowledgeable and technical player.
You could go watch Cow's 3-ish hour video guide. It's based on 5 vanilla though. http://www.freestepdodge.com/threads/lei-fang-in-depth-live-stream-tutorial.2749/