Try around 60-75 depending on your skill level if it's your first time through it. Artorias of the Abyss is additional content for the game Dark Souls. I explored with a character at level 75 and while it is possible to conquer the DLC at lower levels it This DLC's story is closely linked to its predecessor, and FromSoftware has been treating the two as one unit akin to Bloodborne's The Old Hunters or the first Dark Souls' Artorias of the Abyss Dark Souls: Remastered includes the main game plus the Artorias of the Abyss DLC.
