That the Adlo shield only lasts about 30 seconds ><

There are many times where I cast it pre fight and because tanks takes long to pull I have to recast it. Sometimes I end up casting it right as they pull to make sure they have it up before they attack, but it doesnt go off fast enough and I pull hate for a sec. Why cant it be like Stoneskin where the effect of the shield lasts 30 minutes or up until they get hit for the shield amount.

That is literally the only issue i have with my SCH ;-(