Right hand weapon 1: Hollow Onikiri and Ubadachi +10 or Hollow warden twin blades +10 or Hollow great Corvian scythe +10.
Right hand weapon 2: Hollow Carthus great sword +10.
Left hand weapon 2: Hollow Llewellyn shield +10, Hollow target shield +10, Hollow leather shield +10.
Armor: Shadow garb, Shadow gauntlets, Shadow leggings.
With the great corvian scythe : Hood of prayer, robe of prayer, skirt of prayer, shadow gauntlets?
Rings: Carthus milking, Hunter's ring , Knight's ring, Pontiff's right eye or the one you like better.
When every rings listed above is equipped, you should have good stats:
Gameplay: You should buy as much Carthus rouge as you can.
Before every boss fight and during or before fighting a tough enemy buff your weapon with Carthus rouge.
The rest depends on your skills.
Good luck, so to speak.