Theres some half-baked, half-cooked half-something joke to be made here
For example, among the cards available on TCGPlayer, the third most expensive is an Unlimited Edition of Mox Sapphire, which has an average price of $3,400 for a lightly played version, whereas it can go upward of $5,000 for near mint, based on availability
Focusing on discard is certainly the most common, and its quite effective with cards like Containment Construct to help break symmetry, but you can toy around with sacrifice synergies and even fiddle with a group-hug-esque strategy depending on your card choices
bottom-up approach
Avoid Colorless Cards (Almost Always) It can be tempting to grab a rare or mythic colorless card you see floating around late in the pack, especially if it looks flashy or powerful
Leinore is particularly noteworthy for her Coven ability