It's important to point out that our two commanders work especially well with the new summons, but there's only 4 in the entire deck so it's not a focus for the stock list
However, Cinderella really justifies a high cost, with an ability that sees her counting as a 9 Ink character when singing Songs, as well as a bonus that sees her adding 1 Lore to every other Princess character when she does sing on a turn
sell these raw or in bulk instead
The true lock-out comes in the form of 2 Sterling Grove's, Solitary Confinement, and at least one but preferably 2 enchantress effects
Similar to developing a reputation as a trusted seller, look for ways to become a go-to buyer
In a similar sense, I think that if we are working with self milling cards or just a high ratio of spell cards in general, then Psychic Spiral can itself be a powerful win condition to reach a similar goal as the previous examples