Dauthi Voidwalker is excellent here: its shadow evasion lets it attack past their ground creatures, and exiling cards headed to their graveyard shuts down Hogaak's delve/dredge-style recursion and Stitcher's Supplier value. Long Goodbye kills Hogaak, Dark Matter Manipulator, Mockingbird, or Kaito cleanly and can't be Force of Will'd or Daze'd away for free since it can't be countered. Opposition Agent is weaker here since this matchup has little library searching beyond fetchlands, and Mai dies too easily while only taxing their noncreature spells modestly. Keep Thoughtseize and Sheoldred's Edict in to strip their hand and answer Hogaak.