Watching the flash for me means seeing the bar go down, and pre-pressing before it gets to the bottom.
I've set up some new hotkey assignments for my OCDs, so I'm going to play around with them to see if that can help.
An annoyance I've found is sometimes I am quicker than the buff for Force Potency, and once charge gets eaten by Turbulence, any way around that other than to click a hair slower?