Here’s a map on the available resources near the starting camp of The Hissing Waste. You can farm tier 3 Nevarrite nodes, Vandal Aria and Deathroot (there’s Volcanic Aurum too but only 2 nodes and they’re way up the rock). The starting area of The Hissing Waste is fairly a safe place to roam around since you won’t encounter enemies until you venture further out. Therefore, you might want to unlock this map at an early level just to get tier 3 metals to max the DPS of your weapons (primary slot on weapons use metals).
The enemies on the map below are around level 16. They won’t notice you if you are far from them. It might be best to bring just your main character if you intend to just farm the Nevearrite nodes. If you are a rogue, then you can just stealth your way through some resources near enemies.
A thing to note though, mining tier 3 metal deposits will only give you 1 piece of metal per node if you are low level (you must be at least level 16 to receive the normal quantity of metal pieces per node). However, as you can see from the map, there’s a lot of neverrite nodes for you to gather on a single run. Those indicated with (?) means that the resources could be or not be there. I just checked this on two characters and sometimes the metal node is not present on the other character’s game.
Also, the resources might be farther than they appear on the map since The Hissing Waste is a fairly huge map.