From the 6.2.0 patch notes:
Night Mother’s Gaze: This set now applies Major Breach for 4 seconds, rather than Major Fracture for 6 seconds when you Critically Strike an enemy.
Why would a stamina based set even want to reduce a target's spell resistance? Reducing physical resistance makes far more sense.
Night Mother's Gaze - current bonuses
2 items: Adds 833 Weapon Critical
3 items: Adds 129 Weapon Damage
4 items: Adds 833 Weapon Critical
5 items: When you deal Critical Damage you apply Major Fracture to the enemy, reducing their Physical Resistance by 5280 for 6 seconds.
Why change this at all? I fail to see the logic.
Ray