Titanborn Strength 5 Pieces keeping 50 % for 4k pen and 500wep dmg
Balorgh 2 Pieces makes 100% uptime with the bear 75x23 = almost 2k pen and 150 weap dmg
Titanic Cleave for the Cleave Time of your life
thunderous volley for second bar
Malacath Ring for Non Crit + 25%
rest is up to you 2 slots left

To gather more intel

We get
238 Weapon Damage from Mundus Stone
258 Weapon Damage from Orc Passive
848 Weapon Damage from the Sets
660 Weapon Damage from the Vampire Buff adding 10% each second 720, 780 and so go on

Giving us at least 2004 Weapon Damage

8172 Penetration Bonus from the Sets at 50% life

28% Major Brutality increase from Warden Buff
21% Weapon Power from Medium Armor Passive
15% increase weapon dmg from Nirnhoned Weapon

Making it 64% Increased Weapon Power or 15% less if im Wrong with Nirnhoned since it says Weapon Dmg not Power

8% Minor Fury increase from Warden Buff
25% dmg from Malacaths Band

33%increased dmg overall