Does it exist? Yes. At this link you will find (yet another PvP video of someone owning a bunch of people to music) a pretty decent display of technique. This video has two things going for it that I really like. The first is that you can crank it up to 1080P making it possible to see what is going on, and the second is that the addon he uses makes each spell he is casting and ability he is using clearly visible. If you find the music distracting I would mute it, but pay attention there is a lot of good stuff here. I will keep looking for more huides etc and any further Destro ones I find I will post up here.