In most instances, the ideal use of the Delt Triad is after you've done a compound movement with heavy weight and lower reps. Five sets of five reps of standing barbell shoulder presses would work perfectly. Then move on to the Delt Triad to finish off your delt workout with a good, fascia-stretching pump.
Putting It All Together
I tend to train rear delts with back because, functionally, it makes more sense. So, here's an example of a shoulder routine using the Delt Triad:
A) Standing barbell shoulder press
5 x 5
B1) Seated lateral raises
3 x 12-15
B2) Seated front raises
3 x 12-15
B3) Seated dumbbell shoulder press
3 x 12-15
C) Shoulder stretches (horizontal adduction and horizontal abduction)
2 x 20 seconds each