The way this Build works is that you'll use the very fast attacks of Loretta's War Sickle to melt enemies in one or two attacks, and Bosses in less than a minute. When you combine the fast attacks of the War Sickle with high Poise and Talismans like Winged Sword Insignia and Millicent's Prosthesis you get very high DPS.

Casting Freezing Mist on a Boss first will debuff them and increase the damage you do to them before beginning your assault. I usually cast this an then try to keep them in the mist until Frostbite triggers and then go to town.

Halberds are exceptional on horseback because of their hitboxes and attack speed, so learn to fight from horseback when you can, and consider adding the Lance Talisman when doing so for even more damage.

Loretta's Slash is very situational, and this build is not setup to optimize its damage. However, it's great against enemies that hit hard since they can't stagger you out of it, allowing you to connect for damage 99% of the time. Trading damage is fine with this build since you have high protection.