With this deck you are trying to outvalue and overrun your opponent within the first 5 turns and hope that you have more recursion than they have removal.
Unspeakable Torment can give this deck the extra reach that it desperately needs. However, against other aggro decks (and especially decks with lifegain), you need to get lucky and sneak in the remaining damage.
Memory Dredger seems too slow for this version.
The flexibility of
Vara's Intervention is fantastic. It can even kill an enemy
Hojan, Crownbreaker.
Having access to
Haunting Scream would be great, but the deck is already light on threats and heavy on recursion and tricks. However, given how fragile this version is (and how much giving your units Charge would improve it), three factions may still turn out to be the better shell for
Kira, the Prodigy.