Thanks to my mate for giving me the idea of crit warwick :)

Let me know why do you if you downvote. This is my first guide, just a funny experiment and is more a build than a guide, please take that in mind.

Pros:

+Very high MS (good for capturing, hunting and running away from enemies)
+Hard to kill
+Almoast unbeatable 1v1

Cons:

-Can be easily beaten by a good Ashe (her slow, you will dodge her ulti easy with such MS)
-Maybe not the that high damage output until you buy bf sword
-His ulti doesn't deal much damage with this build

Well runes I personally have are a mess of crit chance, flat ad and ARpen, so its up to you what runes you take. I suggest some damage beacause this build lacks some in early game.

I prefer Hungering strike over Hunters call at start because you won't be facing many solo opponents to actually use that attack speed (I normally go top). But it helps you GREAT later in the game.

I normally take ghost in dominion with most of the champions, with warwick you can get tons of MS with ghost + speed buff + phantom dancers and boots + blood scent to catch or run from aneyone and of course helps you to capture points.
I just love to play against an akali with ignite. :) That and the damage explains everything.

The build is the best/strangest part of the guide. I tried it just for joke and after that I take Warwick every dominion game if not my whole team is AD. Since I tried this build i've always been #1 in our team and lost only once (this may change while u're reading this ;)).

The AS from phantoms is perfect for Warwick's passive, but the crit is just awesome (I wont even mention Move speed).
For some early damage I take B.F. sword and than continue with phantoms.
I dont need much survivability because of my ability to heal and even when low HP you can use ult on the enemy and heal up, than q+w and kill him while you had no hp at first (its such a joy to doin' that). If a group is coming to gank you, you'll notice it and because of your superfast MS the gank will usually fail. If you feel like getting some HP, just buy phage earlyer and enemies now will have absolutely NO chance to escape when you get to them, plus some hp.
Infinity edge will absolutely make you an insane damage machine. Crit, dmg and crit dmg. All you need for infinity kills.
Then it's good to get some HP becouse enemies will get bursty. Frozen mallet is the solution.
For the final item extra damage and lifesteal - get a Bloodthirster.
If you wish, you can sell boots and buy another item (depending on teams).

Dont troll, have fun and try this build while it's not that stupid as it looks like ^^
P.S.: Sorry for my very bad english and please leave suggestions and critics below.