For this crusader build, you’ll need a decent two-handed weapon which gives you incredible DPS. Fortunately, the Heavenly Strength passive lets you wield a shield at the same time, so you don’t have to give up any of your survivability. With Schaefer’s Hammer, you’ll gain a huge AoE that can proc whenever you take a hit, and you’ll be able to quickly tear through large groups of mobs.
Hold Your Ground and Divine Fortress boost your survivability while Bombardment and Falling Hammer give you extremely high burst DPS. Like most crusader builds, you won’t hit terribly often, but when you do, you’ll clear the screen of enemies.