Gear and loot filtering
Upgrade an item to extend its useful life
Invest crafting resources in a strong existing item with useful affixes when its one available upgrade can keep it competitive.
The crafting interface, with an eligible existing item selected from your inventory.
Each item can be upgraded once. You can upgrade other eligible items, but there is no repeat upgrade loop for the same piece.
Stop once the chosen item has received its upgrade or a stronger replacement makes the investment unnecessary. Move resources to another promising item or an affix change.
Open a guide to find other locations and see what the item is used for.
Invest crafting resources in a strong existing item with useful affixes when its one available upgrade can keep it competitive.