Clear the exit before the vein
Mining feeds Engineering, which provides Goblin Sapper Charges, Target Dummies, and ranged pull tools. Copper, Tin, Iron, and Thorium become future bombs or utility crafts. In a cave, plan the route out before mining the node.
What the ore provides
Engineering fuel for bombs, dummies, and utility tools. Mining keeps the kit stocked without relying entirely on Auction House gold.
Blacksmithing support for Warrior and Paladin. Mithril crafts cover the level 30–40 weapon gap, where outdated weapons make routine fights longer.
Ore and bars sell steadily because Engineering and Blacksmithing need them on an active server.
Read the cave
Dun Morogh tunnels, Venture Co. mines in Stranglethorn, Searing Gorge, and Badlands caves have fast respawns, runners, and narrow exits. A respawn behind you can close the way out while you mine.
Leave the risky vein
Leave a vein behind two uncertain pulls or inside a cave you have not cleared. Another node will appear.
Who benefits
Warrior, Hunter, Paladin, Rogue, and Shaman get direct value when Engineering follows. Mage, Priest, and Warlock rarely need ore by itself and often have better feeder pairs. Choose Mining when it supports the profession package you will keep stocked.
Plan the route out
Clear the route home before you mine. Fast respawns are the danger on the way out.