This deck needs 3 each of Budding Vaettr/Retreat, but I don't have them; I only use this deck in Replenish trials for that reason.
You're looking to combo out by using something like Necrogeddon - Monstrous Brood - God Hand - Cullng the Flock; you can add extra God Hands/Crimson Bulls to the combo.
Skythorn, Scav+Animovore, Sister of the Fox and Fertile Soil are necessary to semi-reliably assemble the combo pieces.
You generally want to ramp up to 4 growth so you can play Rat King; further sacrificing for resources isn't really needed.
You can get enough resources for the combo by playing scrolls like Rat King or Noaidi that give way more resources than they cost; the first Necrogeddon should give you enough resources from the Replenish + Budding Retreat on the husks.
This is pretty much the dream combo.