Unless something has changed in the realm of linked brakes, the best most efficient way of obtaining maximum threshold braking is to apply both brakes, front AND rear at just about the same time. Using just one dramatically reduces the amount of braking power, or efficiency. From years of police riding and teaching I still find that in a dramatic braking moment I apply my front brake just before I apply the rear to get front end weight shift going in my favor. The best way of doing this is front brake application first followed almost immediately by rear brake application. This method of brake application was instilled in me a long time ago by some very good instructors and it still holds true today.
Braking in a curve is something that we all do and no doubt will continue to do, but there are certain limitations to braking in a curve. This has somewhat changed with the advent of certain high end ABS systems that allow hard braking in a curve, but absent that we can still brake in a curve as long as we don't overdo it, or panic. For most riders who find themselves in trouble in a curve and need maximum braking efficiency, the best course of action is to stand the bike upright and properly apply both brakes. This can be quite difficult to do for a lot of riders as our first thought is to negotiate the curve with secondary thought given to braking. When it finally dawns on them to brake it is either too little too late, or they completely blow the application of their brakes and jump on them. This is where a little track time can really help out when trying to learn how to negotiate curves and brake in a curve. Most often setup for a curve can be the biggest help of all and never ride over your experience level. Remember too that you should base your speed on how far you can see through a curve. Ride safe and practice braking as much as you can.
Rick H.