This is a grindy blink midrange deck full of fetchlands, so Ashiok, Dream Render cuts off their card selection and graveyard recursion targets for Emperor of Bones and Overlord of the Balemurk. Extirpate is redundant with our maindeck Surgical Extraction but adds more graveyard disruption against Flickerwisp/Ephemerate value loops, and we trim one Glimpse the Unthinkable since raw mill speed matters less than disrupting their engine pieces. Keep the bulk of our mill package intact since they have no wraths for our small creatures and this becomes a mill race we're favored to win if uninterrupted.