Notes from author
Corrupt Artorias = No shield besides Dark Hand, which could feasibly have come from Abyss corruption. High HP/Stamina means you should play aggressively but low defense means you must play smart. Dodge attacks when possible, since the DH is not a very stable shield. Dark Hand/Bare Fist parry if needed (bonus style points awarded).
Black Flame to semi-simulate the sludge he throws in the boss fight. Darkwraith because he's corrupt. 10+ Humanity for max Abyss Greatsword Damage.
Could swap 4 Dex for 4 Str if wanting to use Cleansing Greatshield with no impact to 1h damage, 2h will lose 12 AR.
Can swap Wolf Ring for Havel's Ring for fast roll, as well as swap Leggings of Artorias for Dark Leggings if not a fan of LoA's appearance, this will give marginally higher Physical Defense, same poise, marginally lower Elemental Defense + Resistances.