The costliest Radiance mistake is socketing it into a mediocre weapon before the rest of the build can support Herald scaling. At level 50, Jiquani's Soul Core of Radiance grants +1 to all Herald Skill Gems, but that bonus cannot repair weak base damage, poor attack speed, or unreliable defenses. Players should treat the core as a late upgrade and preserve their Path of Exile 2 Currency for a...