WAR raid "UTILITY" (Tank Balanced achieved?)

[Reynhart]

Its cd is 30s shorter than DV, and the shield is better by virtue of affecting WAR as well even before you eat things to buff it.

Well, it will need some testing, but looking at how it's worded, it seems there is a another big difference between Shake It Off and Divine Veil.
Shake it off : "creates a barrier around self and all nearby party members that absorbs damage totaling 8% of maximum HP."
Divine Veil : "Prevents damage up to 10% of your maximum HP"

So, for now, we could assume that SiO works like Stoneskin, and scales on the receiver's max HP. As stats go higher and higher, SiO will fall behind more and more, keeping it "balanced" with its shorter CD and the benefit from WAR.