Primarily a fighter, Warwick can both deal and take a significant amount of damage. The onhit, tanky build allows him to do just that. After experimenting with different builds and setups, this one is my go-to. Although it lacks waveclear early from a tiamat item, it does offer more tankiness and damage due to the synergy between attack speed, warwick's onhit passive, Fervor of battle, and wits end. In a duel, I have yet to see a champion (other than maybe jax) that will beat me in a duel after getting the core build plus deadman's plate. If there happens to be no magic damage on the other team, the most effective option is to replace wit's end with tiamat into Titanic hydra.

[*] Pros
Scary af
High damage for tankyness
nasty healing
Strong duelist
Best dance (those hips)

Cons

Kiteable(ish)
Weak against Healers
Ult is easy to miss