Completed The High Priestess with 12 Blessings and the Holy Mace.
Obviously, you need a holy mace and a lot of encounters which provide blessings. However, from my experience, it is best to run two cards that give fame and golds, since you need 16 fame to equip holy mace and some money to trade for blessings.
I chose “Duel” and “Winding Trail,” but you are free to choose others. Basically, you should have one card that gives a lot of fame and another that gives golds.
As for equipment, get a lot of stuff that helps you win bets.
And add a blessing to your supply.
For companion, Adriane is the best, since you will do a lot of card bets.
And don’t forget to dig out every avalanche to gain free blessings.