Warwick can be a champion that goes into a fight and comes out with full hp. This build will make that happen almost every time. (unless ganked by like 75 ninjas). :)

The items shown will determine life or death against the opponent because of the attacks you can dish out and the heath you will get back. Also before going rambo on their team make sure you get some more minion kills or jungle kills with the bloodthrister.

The sequence is mainly for staying in lane until u need to leave. (for a gank or buying items).

Warwick is not really a team battle starter unless you use your ult on someone. Warwick is good a ganking low health people because of is ult and blood scent.

The only thing i can think of for unique skills is to go bottom if on the blue team and top on the purple team. (take a pause to think about why). If your can not go get health back from a minion because there is ranged people ready to kill you you can run back and take a bite out of one of the golems then your back into laning.

Pros
Warwick can heal well
Can suppress champions
Sprints at low health champs
Increases his own and other champions attack speed
Cons
If he does not get the proper stacks for damage he will only be awesome
He can die fairly quickly unless he actually hits someone