Raise the action vs heavier strings: Heavier strings are the simpler fix for fret buzz in lower tunings
Raising the action (via truss rod or saddle) targets specific buzz locations but requires careful adjustment. Heavier strings (e.g., 12-53 or 13s) increase tension naturally, reducing buzz across the neck without modification. For a budget acoustic, some buzz under heavy strumming is normal and inaudible to an audience.