The Boomsday Project Guide
The leader of Hagatha’s dark cult hides behind her loyal minions.
One of the keys to this fight is being able to consistently remove the Crowskin Faithful, who are cheap and can rack up a ton of damage on your face quickly if you're not prepared. Having cheap AOE like Explosive Trap and Multishot can help, but I find the most consistent way of getting rid of them is choosing the Companionship feat to give your hounds enough attack to consistently keep the cultists off the board, allowing you to save your stronger cards to counter her more powerful demons.
I recommend pick aoe and good taunt.