Sarevok, Deathbringer and Raised By Giants Deck Help

I've been building decks along the color challenge (making at least one deck per color combination) and for Golgari, I'm really interested in running [[Sarevok, Deathbringer]] and [[Raised By Giants]] as the commander and background.

I've tried building it sacrifice heavy with the reasoning of "if they don't have anything to remove, they can't have anything leave the battlefield." While this seems to kinda work, it gets hard countered by any treasure, token, sacrifice deck, or anything similar because they either make enough in one turn to sacrifice anyway or can just get something killed in combat. Not to mention fetch lands exist, which is a whole other issue.

Are there any cards I can throw in to mitigate these hard counters, or even a completely different archetype to build for Sarevok that prevents being hard countered by 30% of Magic decks?