I tried it softer and lower. No good for me. But after shooting it about a dozen times just straight rolling into the one, I had great consistency and excellent control.
I shot slightly above center to get the cb rolling. Not really a slow roll. Here's how firm I hit it: When I move the one and shoot the cb into the end rail at the same speed, it bounces back to about one diamond past the side pocket on the same side of the table where the cb started.
I think you're spot on when you say you'd need to set these "what would you do" shots up in order to truly answer how you'd play it. Great advice.
Yup. I hear you. Having worked with hundreds of players, one-on-one over the years, I have a unique glimpse into the mindset of players regarding different types of shots, and I have a pretty good idea of where you're coming from.
Just keep this in mind: Knowing how to apply maximum backspin and controlling the speed is a huge weapon for your arsenal of shots. In order to accomplish this, your cue stick must travel back and forth on the exact same plane without deviation. Whatever angle of attack you choose, you must keep from beginning to end. That means no 'dipping' into the cb the last second before impact. The cb will jump if a player does that. (I'm not saying that you do that, but it's a common issue.)
Another issue in applying maximum backspin is a players ability to accept scraping the cloth with their cue stick. It can't be avoided and cloths are meant to endure it at a reasonable angle of attack.
If you're not used to using it, maximum backspin will take you right out of your comfort zone. But don't give up on it. Learn it and learn to like it. It's worth it. Believe me.