You can be deep into Diablo 4's endgame and still feel like your hits barely register. I've done it. Gear looks fine, Paragon's stacked, and then a high-tier Nightmare Dungeon turns into a slow, ugly slog. If you're already farming and you just want to smooth out the grind while you learn the numbers, some folks choose to buy Diablo 4 materials so they can spend more time testing builds and...