Though, Sorin, the character, is a Vampire in addition to being a Planeswalker, so I guess I didn't really color too far outside the lines here
But I would try to keep in mind what the strengths of your brew are, and try to avoid simply becoming a worse Temur Reclamation
Throat Wolf is incredibly overpowered in combat, a creature that has Firstest Strike, an ability that can easily kill creatures with first strike. Its so strong, in fact, that it even creates a never before or since second combat phase where only one creature of its owners choosing can attack
The raw power and catch-all utility of its effect is easier to recur when attached to a cheap-ish creature, producing such huge results that non-white archetypes are trying to actively fit white mana into their decks to play it
If you are on the play, you can play around Force of Negation and Daze by casting Entomb on your opponents upkeep before they have had a chance to play a land
Sacrifice after IV.) I, III Choose target creature