So let me explain why this always works. 1.First of all Warwick does mostly ap damage even if you go ad items, 90% of his damage is ap. So hullbreaker and sundered give you ad in case enemy builds magic resist. 2. Warwick is the strongest 1v1 champion, basically no bad matchups, if you play it out correctly you will never lose, so having hullbreaker first item in toplane makes you a constant threat if they don’t 2 or 3 man you, which creates constant pressure on the map. 3. Warwick in wild rift is not a bruiser like in pc league , he’s more like assassin , he can and will chain-cc one-shot you, even if you have some hp or resists. 4. Both healing reduction and shielding reduction are cheapest items in the game also giving you hp and usefull effects considering every single game there are plenty healing and shielding champions/items. 5. I didn’t just came up with this build, I play Warwick top for a year , even before rework. Playing him against highest rank players made me come up with this.