This build is for dealing maximum damage with dark sorceries, even against bosses with high magic resistance, because of Pursuers and Dark Bead dealing physical damage.
The Manus Catalyst is best for dark magic, because of his high STR-scaling which affects dark sorcery. For Crystal Souls Spear and other non-dark sorceries Logan's Catalyst or the Tin Crystallization Catalyst would be a better choice.
