Sorcery Ward vs Darkness

Let's compare these two.

Sorc Ward:
35% Less Arm/EV
with 0.4 changes you will get around 2,5 - 3k shield that absorbs everything.


Darkness:
No Spirit
Scales up to almost 2k shield.

Sorcery Ward has higher Shield value while also having not that bad drawback.
Why do you hate Darkness?