A build theory that could work for 1vX and 1v1. Nothing extremely special, but this build can be (in theory) extremely tanky while doing loads of damage. 2-H bar is made for damage and some utility, and 1-H and board is made for buffing and utility.

Gear Sets that make this even more tanky and put out a little more damage.

2 Set of either Molag Kena (More DPS) or Mighty Chudan (More Sustain)-
Gear Slot: Head and Shoulders
Armour Type: Heavy
Trait: Impen.
Enchantment: Prismatic Defense

5 Set of Hunding's Rage-
Gear Slot: Chest, Hands, Belt, Legs, and Boots
Armour Type: Heavy
Trait: Impen or Divines
Enchantment: Prismatic Defense

5 Set of Mark of Pariah
Gear Slot: Amulet, Ring, Ring, One-Hand Weapon and Shield
Trait=
One-Hand Weapon- Nirhoned or Sharpened
Shield- Nirnhoned or Impen.
Jewelry- Healthy (More Defense) or Robust (More DPS)
Enchantment=
One-Hand Weapon- Glyph of Absorb Health (More Sustain) or Glyph of Weapon Damage (More DPS)
Shield- Prismatic Defense
Jewelry- Glyph of Physical Harm

2-H Maelstrom Greatsword
Gear Slot: Primary Weapon
Trait: Weighted
Enchantment: Merciless Charge