So few of us have ever been involved in a shooting incident, much less multiple shooting incidents, that most opinions about what is the best technique are just that - opinions - about what works best in the defensive use of a firearm.
Personal defense has a lot of factors, but shooting fast with acceptable accuracy is definitely an important one. The accuracy that one needs for many pistol disciplines far exceeds that needed in a typical self defense scenario. If you're taking advantage of the accuracy that SA or staging give you, you're probably shooting at a much longer range than most defensive encounters. If you're three yards away, even aiming may be a luxury that will get you killed.
IMO, the pistol disciplines that most closely approximate the
shooting skills you need in a defensive scenario are action pistol like IDPA and USPSA. They aren't the only skills you need, but they approximate the way that you will use the gun. And if you look at the way top shooters manipulate their revolvers, it is with straight through pulls on 95+% of the shots. Unless precise accuracy is needed, "grip it and rip it" is the order of the day. However fast you can go and keep shots within 4"-6" is what you do. One inch groups at 25 yards are a luxury you can't afford if you want to win.
So that's how you train. You ingrain that into your body movements so that it's second nature. You will react to sudden danger the same way every time. If the situation calls for high accuracy, you will likely have the distance/time to consciously make that decision.
This opinion is solely mine, and is worth exactly what you paid for it.

It's your ass - you do what you think is right.
Buck