Let me explain how legendary items work in these games, because there's a common misconception about their power scaling. They actually don't get stronger as you level up - instead, they maintain fixed stats throughout your journey (this is actually based on traditional D&D rules, which is pretty interesting).

You'll find different legendary items as you progress through the acts, and that's really how power progression works with these special pieces. For instance, the blood of lathander mace you might find early on will always keep its +3 bonus and sunbeam ability, while later discoveries like the helm of balduran will have naturally stronger effects suited for tougher challenges.

Something worth knowing - this fixed-stat approach actually helps maintain build diversity, because you need to think strategically about which legendary items complement your character's abilities (rather than just equipping whatever has the highest numbers). When you reach act 3, you'll discover some particularly powerful options like balduran's giantslayer, which packs quite a punch compared to earlier finds.

Just keep in mind that while there are mods out there that change various game aspects, the legendary items themselves stay true to their original stats. This really encourages you to explore and hunt for specific items that match your playstyle, rather than just waiting to outlevel them.