Most guides rank Pals by Mining Lv and stop there. In practice, you choose a miner per resource: the cheapest Pal that clears the node first, then the optimum you switch to once you can field an S/A-tier roster. The table below cascades both — early pick (works on day one) and the optimum once you've unlocked higher tiers.
Stone. Used for almost every base structure recipe. Any Lv 1+ Pal works; speed-up only matters past the first 5 hours.
Ore. The first ore that gates progression — needed for ingots, pickaxe upgrades, and most weapons. Skip B-tier and breed straight to Digtoise if you can.
Coal. Needed for refined ingots + gunpowder. The full where-to-mine breakdown lives in the coal guide.
Sulfur. Used for gunpowder + tech-tier explosives. Sulfur nodes cluster in volcanic biomes — pair the miner with a heat-tolerant teammate.
Pure Quartz. Circuit-board input for late-tech weapons. Where-to-mine coverage in the Pure Quartz guide.
Hexolite. Feybreak ore. Our seed puts 335 of the 349 nodes on Feybreak and the other 14 on the outlying isles — none in the Astral Mountains. Note the naming: items.json ships both Hexolite and Hexolite Quartz as separate items.
Chromite. The top of the Mining ladder. No base structure requires this level — every mining building in the game staffs at Mining Lv 1 — so what these buy you is speed: the same cycle a Lv 1 Pal takes ten minutes over finishes in seconds.