All this complex gibberish I wrote below is now outdated. Use the Gun slash PA named レーゲンシュラーク [Translation: Reegenshuraaku] to travel through the air / ground as quickly as possible. With the new patch update (9/27/17) Gun slash recovers even more PP than before which is amazing. Just spam it for travel. There is no technique required.
As of today Guren wash dashing is for style points only. Gun slash is easier, you move faster, and its universal. That means you can use it for any class. I won’t erase what I wrote below. Just know if you’re still using that way you’re wasting your time and energy.
This is a special type of dash that allows a player to move quickly. It’s a combination of L.A. (lobby action) dashing using a PA skill. It looks like what’s shown in this video. The problem is I could never do it. Maybe its because I have more lag? I don’t know but I finally figured out a way it works for me. The way I do it is…
PA skill, Alt+W, slight delay, W, W (repeat). The trick, for me at least, was to press and hold ALT slightly sooner than W. This way I do not get the second attack slowing me down. Also notice I left out the dash Macro (X). This is a simplified version meaning it’s less likely there will be incorrect inputs. Do note this particular dash can only be used with Braver as a main or sub class because it uses the Katana PA.
Edit: Another way (arguably easier?)
While holding “W” the entire time, PA skill, ATL, X. (repeat) Inputs are easier but timing is more strict.
The methods I explained above do not seem to work in air. In air a different method must be used. PA, X, W repeat. The simplest way is to press X during the just attack flash. I will try to find something better but for now this is an option if you want to avoid hitting the ground for some reason.