Varina, Lich Queen (EDH / Commander)

My 1st/initial build for Varina, Lich Queen, converting my Scarab God deck to Esper with Varina now at the helm. This is far from what a tuned version of the deck will look like.

Recent cuts:

Ephara, God of the Polis - not enough generation on opponent's turns; prefer to make zombies with Varina on the last turn before mine to bluff open mana for answers (or y'know, because I actually have answers)
Faces of the Past - Not enough tap effects. Will reconsider when I have more like Lich Lord of Unx
1x Other cards I can't think of

Recent Additions:

Dire Undercurrents - It was relatively cheap and looked fun, thought I'd give it a try.
Liliana, Death's Majesty - Pro Zombie maker and Creature git'r.
Anointed Procession - Self explanatory.

Maybe Cuts:

Embalmer's Tools - Not what the deck wants to do. Works well if Radiant Destiny is out or need to be on defensive, though.
Ertai, the Corrupted - Not a Zombie and I want my Zombies more than I want to sacrifice them due to Varina.
Josu Vess, Lich Knight - Way too expensive. The deck needs some more speed.
Ojutai's Command - Would just rather have a Cryptic Command or something else here.
Path to Exile - May replace with Vindicate or Utter End. Would like a wider range of target potential.
Thornbite Staff - I don't really have a Combo with this, so there's no point in it really being in here. Being replaced ASAP.

Potential Additions:

Necromancer's Covenant (tokens+utility)
Living Death (utility)
Lord of the Undead (buffs)
Alhammaret's Archive (draw+lifegain)
Solitary Confinement (Varina utility)
Necropotence (draw)
Relentless Dead (good Zombie is good)
Kalitas, Traitor of Ghet (tokens + hate)
Crucible of Worlds (utility)
Tombstone Stairwell (tokens)
Rhystic Study (draw)
Sidisi, Undead Vizier (tutor)
Eldrazi Monument (protection)
Lich Lord of Unx (tokens)
Pull from Eternity (GY/exile recovery)
Leyline of the Void + Bridge from Below (tokens)
Dark Salvation (Varina synergy, but mana intensive)
Dread Summons (Varina synergy)
From Under the Floorboards (Varina synergy)
Graf Harvest (evasion)
Entomb (tutor + pitch GY protection)
Kozilek, Butcher of Truth (GY protection)
Ulamog, the Infinite Gyre (GY protection)