this is my first build hope u like it :)
i made this build because i wanted to make a build with warwick that had much movement speed much attack speed and much damage.
you can use flash instead of heal but heal is better to have if you want to be legendary.
is good if warwick buy infinity edge because with two phantom dancers you crit very much.
its good to buy the madred's bloodrazor because you win tanks easy with it.
its good if you buy attack damage runes so you get first blood easyer.

if you have much attack damage infinite duress get more powerfull.
you need to buy 2 phantom dancers because it gives you speed,attack speed and damage.
you need to use flash to ecape when you gott low health.
flash makes warwick to a great champion that dont die much.
heal are usefull when u want to make first blood and its usefull the whole game.

exhaust: not so usefull but its ok

ghost: not usefull at all. you got so much speed in this build so why?

flash: really usefull if play as warwick because you can escape in low lvls.

heal: helps you get much kills. so use it much.

fortify:this spell is not usefull its better if you use ignite.

ignite: ignite are really good for first blood but not so usefull in higher lvls.

revive:do never use this!!!

Teleport:its good but not usefull when u play as warwick thats so fast.