Warwick is one of the most sustainable jg champs in all the game, this makes him capable of clear the jungle 4 times at yhe beginnig without get back to the base and also he can get a lot of helps in the early game even witout get involved in direct combat.
If you play correctly in the first 10 minutes you can get 2 full objects equiped and begin to unleash your power in the opposite team.
When you play as warwick yo need to think that your ganks only will let you deads after a lot of farming in the jungle. Get kills on the first 10 min. Of battle is very risky for your champ, so try to avoid direct combat and better use your w behind your teammates, this will make them fastest and get one assist for you if they kill the enemy making you and your friends feed and leeting the risk out
In the late game a well ww player can go victorius in fights 1 vs 3 thanks to your health and regeneration.

NEVER face more than 3 enemmy champs alone unless you alredy have the full equipment and you enemies dont