Duffy is a really cool guy, I’ll take a class from him anytime.
Weaponized geometry is basically fundamentals of footwork and how to pi based on angles. Really simple in fundamentals, really frustrating when the angles start stacking up from multiple doors/halls etc. I enjoyed the class, I’d say have your pistol fundamentals squared away so you can focus on the tasks at hand if you take it.
If you have a specific question about that class I’ll answer what I can.