Tired of your stylish set pieces feeling...underpowered? In Diablo 2 Resurrected (D2R), upgrading set items is crucial for keeping your character competitive as you progress through Nightmare and Hell difficulties. Unfortunately, you can't directly upgrade set items using the Horadric Cube recipes like you can with unique items. Set items remain static.
However, don't despair! While you can't upgrade the base item type itself, focusing on *finding better versions* is key. As you increase the difficulty level and character level, you'll start finding higher-level versions of the *exact same* set items with improved stats and potentially better rolls.
So, instead of Cubing, farm those high-level areas like Chaos Sanctuary, Worldstone Keep, and Baal runs. The higher the Monster Level (mlvl), the better your chances of finding those coveted set items with superior stats. Keep grinding, and you'll soon be rocking a fully optimized, fashionable, and powerful set!