Bench bleed the master first, this can take a bit of time. Then gravity bleed the entire system starting with the farthest bleeder from the master cylinder. Go around the car several times. Apply the pedal to push the pistons out, do not pump it rapidly as this just airiates the fluid. Gravity bleed some more then with an assistant pressure bleed starting at the farthest bleeder first by applying pedal pressure, opening the bleeder than closing it before the pedal is released again.

I'm sure you know all this, sometimes we just need a reminder.