I use this several ways.
A. I like to use it in an aggressive attacking pattern fitted in with other strikes coming from different angles then flowing into the up and down motion once they are concentrating on different angles and vice versa.
B. I like to use it against someone who twirls alot and just target their hand, wrist and forearms and the intersecting point.
C. I like to use it against someone who is just not controlling the distance well and allows me to strike at their weapon bearing hand in and up and down motion for a quick and immediate disarm.
D. If someone where to surprive me I might just use this as a defensive counter reaction to create space and regain control of the distance.
Lots of different ways to use it. If you have some more input let me know.