Hi, this it the best guide for a warwick Ability Power

With this runes + Doran`s ring you can start with 700 hp and a litle good Ability power.

A good Masteries to resist hits of enemy and do so dmg with Hungering Strike (Q)

If you play so good you can have 20 stacks you can owned the enemy.
With this build you can kill and heal you a lot.

The warwick need so team play /teamwork to kill enemy or gank with Infinite Duress (R)

Sequence to use the skills normaly wen you do a gank start with (R) but its beter start with (Q) why you have cd and tehn use the (R) and finaly (W)
When you not have (R) use (W) to start And when you have small hp use (Q) to heal you a lot.