Instead of a 60-card list, Chapin’s PDF suggests starting with an 18-card "engine." These are the irreplaceable cards that define your strategy. Then, build the remaining 42 cards (including lands) around supporting those 18. This prevents "good stuff" piles that have no synergy.
While the book was published in 2013, its core philosophies—such as evaluating proactive vs. reactive cards—remain applicable to modern formats like Modern and Commander. Availability Patrick Chapin Next Level Deckbuilding Pdf 18