Would much rather have:
Daedric Mastery -
1/2 - Grants Minor Daedric Mastery to your pets reducing Area of Effect damage in dungeons and trials by 50%. Reduces cast time of pets by 50%.
2/2 - Grants Major Daedric Mastery to your pets reducing Area of Effect damage in dungeons and trials by 100%. Reduces cast time of pets by 100%.
As pets sorcs usually have high amounts of mana the 1452 doesn't feel like its worth anything and seems more like a useless passive. If a pet dies my current pet costs are:
Volatile Familiar 4 - 3063
Twilight Matriarch 4 - 3063
Assuming all three including atro dies it grants a total of: 4356
To resummon both back to battlefield it costs a total of: 6126
Thats if you have the extra atro out as well. The passive itself feels utterly worthless for me.