Friendly Shielding vs Material Wall

[Tamui]

Ok, so I was deciding to get a buff on my setup and I decided on a defensive one. So, a Conjurer got 4, all in Sorcery; Shifting Silhouette, Friendly Shielding, Magic Barrier and Material Wall.
So I ruled out Shifting Silhouette without a second of a though as the Miss chance is based purely on luck.
Then I ruled out Magic Barrier as more than have have Physical damage.
So two remain. I'll list the Pros and Cons of what I think of both buffs.

Friendly Shielding
30% Protection on level 5.
Duration: 60s Cooldown: 25s Mana: 110

Pros:
Protection gives resistance to all kinds of damage.
Low Mana Cost
Low cooldown that can keep two ally buffed at all times

Cons:
Dependent on ally's Armour Points
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Material Wall
30% Resistance to Physical Damage on level 5.
Duration: 120s Cooldown: 120s Mana: 350

Pros:
Best buff for Conjurer for Physical Damage resistance.

Cons:
Cooldown is equal to duration, thus can only buff one target
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What are your thoughts on those two spells?