AP?? Dude, only Hungering Strike scales from AP. The best way to make his skills more powerful is to take Sorcerer's Shoes. Malady is also good. Your magic resist and health are quite low for a melee champion.
And I see only build order, not a guide.

I have to agree with Zandthee, there needs to be some serious change to this build. blood scent isn't worth much early game and Hungering Strike is much more useful. As for your item choices, I would seriously consider doing some math on it because this guide is putting out about .73 the damage of most of the other builds (average) as well as relying SOLELY on Hungering Strike for damage. so you only add 250 more damage compared to every other build every 6 seconds which is about 45ish more, bringing you up to 80% of the damage and only slight gains in defense.

I'll check back in on the guide in a week to give my final opinion because I am sure you are tweaking but seriously consider using jhoijhoi's guide(how to make a guide) Its easy enough to find and you need some help.

i fixed the skill order thing. that was just a stupid mistake. and yah, as you can tell, i dont write guides ever. so that's why it's pretty ugly. I just wanted to share my build. appreciated though.

A Wits end and a Malady but no Madreads? No taking your ult until level 6? Straight AP stacking on WW? Sorry man but this gets a downvote from me.

Hm, I'm really throwing around questiong marks on this. Starting with 3 doran's rings? Especially you skills are so weird, you should always get your ultimate on level 6 for warwick, you get it on level 11...? And also you put 2 points in your ultimate and 6 in your Blood Scent which isn't even possible. Also blood scent on level 2? When are you going to need that...? It also looks like could be one hitted late game by any AP'er and people with some MR will get significant reduced damage. For the remainder, try to use BB code for goods sake, makes it better readable and understanable, and also I would consider not putting ****, and CAPS LOCKS in your text ;) Best regards