The way this Build works is that you Block Counter off of attacks into your Shield by pressing R2. This often staggers enemies allowing you a Critical Attack, dealing devastating damage, but if not the Block Counter itself does substantial damage on its own.

You'll use Barricade Shield to reduce the Stamina consumption used to Block, allowing for more Block Counters, since these consume considerable Stamina.

Golden Vow is used when Cooperating to buff your group, or your Spirit Summons if you are using a group of them. Sacred Blade is much better when playing solo, as it gives you a ranged option, and buffs your damage considerably for a short while, though it has a long wind up making it hard to use mid boss fight.

Blessing's Boon is good for Coop and solo alike as it adds to the healing over time you are already getting from the Blessed Dew Talisman, and lasts a pretty good amount of time.

Aspects of the Crucible: Tail is your AoE clear spell, and can be replaced with any other AoE when you get one, but it does substantial stagger damage as well, and can drop Trolls and other large enemies with 2 casts. Remember you can hold the cast button when using it to do 2 tail swipes.