Under-represented.

If facing Aggro, hard mulligan for Kobold Librarian, Defile and Dark Skies.

If facing Reno decks, hard mulligan for Bad Luck Albatross (Especially important versus Raza Priest, however be wary of playing Albatross if they have already played Raza and you are giving them Anduin PewPew fuel.

If facing Control, mulligan for Sense Demons and Skull of the Mun’ari.