Now I wont go into every single card in the deck for these patron suggestions. Jus their overall themes. Keep in mind theme is not patron ability. Just an idea around how the patron or their deck works.
1. Dark Brotherhood - General theme is sacrificing power, prestige, and/or cards to generate power/cause opponent card discards/ or an offensive version of Hlaalu (permanent destruction of enemy cards in some way).
2. Morag Tong - potentially an alternative to #1. More focused around sacrificing gold to obtain similar results
3. Necromancer - Revolves around generate lots of agents on the field and manipulating them in ways to obtain power/utility. Probably more focused on sacrificing power/prestige
4. Priests of Y'ffre - Again could be an alternative to #3 where its designed around sacrificing things in order to "grow" units on the field or "grow" cards (nature cards).
5. Dawnguard - focuses on shielding or healing other agents on the field. Perhaps bonus damage against unnatural agents (necromancer or others mentioned below). Maybe something where healing life points could generate prestige
6. Vampire - focuses on "stealing" enemy prestige and sacrificing things for utility/gold gains.