I use BHE and FHE. Post pivot, I'm still looking through the center of the object ball at my original contact point.
BHE will deflect less, and FHE will deflect more.
I use the BHE pivot point for a medium/hard shot, and base it all from there.
So for left cuts with the Pure BHE pivot point:
If I hit it softer than medium/hard, or that ball is farther, I'll add touches of left FHE to have to it squirt over more.
If I'm hitting it harder than medium/hard, I know that it's going to squirt over too much, so I'll add a bit of right FHE to have it squirt more over to the left, but I'll use the BHE to still be on the left side of the ball.
A bridge shorter than the pure pivot point won't add enough compensation: so if you use BHE, you have to hit it muuuch harder, or favour a higher FHE to BHE ratio.
A longer bridge will compensate too much, so you either have to hit it much softer, or add FHE from the other side to make it squirt back.
I kind of look at it like playing an instrument. You can move up and down the neck of the cue, and still play the same chord, but you have to adjust the notes.
To elaborate, you start knowing the "recipe" for a shot: Like I know if I'm using a shorter bridge, this medium shot is going to require 3 tips of left FHE to make it squirt over more than usual, and you use BHE to bring the tip back closer to center so the net result is a tip of left. Or if you're using a medium bridge and you think it's going to swerve too much, so you put half a tip of right BHE and half a tip of right FHE to get a tip of Right. Finally if you're gunna wallop it with say right spin, You crank it all the way over to the left with FHE to make the ball squire to the right, and then you use BHE to put the actual right spin on the ball.
Another option is you just change your bridge length. If you want to hit the shot softer or it's farther, you can just bridge further back, and the pivot will compensate more. It's a very fluid system with lots of options.