Notes from author
A PvE/RP build based around faith and turtling could be used to great effect against bosses as a summoned character. Basically playing as a holy cleric on an Undead mission of your own, I decided against using weapons that are intended to pierce the flesh unless sanctioned by the church (that means that the Morning-Star and Mace are your only friends until you go to the catacombs.) Ideally you put your first level into attunement and grab force or another heal early on then focus on raising your Faith to 25 to grab the Lightning Spear. From then on its raising endurance and getting supplementary items like the Heater shield and chain mail hood and gloves. I'd recommend that you keep a healthy back and forth between the Endurance, Strength, and Vitality and only upgrade your Dex once you grab the Crescent Axe from Patches. You can also use Sanctus once you grab that as well.