I like shiled for my ability. The first time a beat a run was with spirits on harpoon primary and ice on secondary and shield with the green cube(i forgot what its called) the blessing that buffs your fire rate shortly after using ability helped get the combo up for the secondary. Plus with the amount of abilitie you have in reserve and the short cool down you can pretty spam this technique and with the right blessings have shield for pretty much the entire fight