my jungle path is golems, wraiths,wolf camp, bluebuff, golems, redbuff, wraiths
this jungle path should get you to level 6 the fastest

i usually gank at level six at the lane that doesnt have flash or ghost so you will have a high probability of getting a kill. the reason why i take my e at level five is so that i will have some extra movement speed to catch up with the person im ganking.

these items are pretty good for any game situation unlike other builds i like to get bloodrazor last so i have the extra attack speed i need to make the 4% worth it because i prefer getting wriggles which gibes me the 20% chance of 500 on a minion which makes it is easier to take early dragon or barron and i have the extra ward.
the witts end and sunfire depends on the situation if they are killing you too fast i would get sunfire before witts end but if it takes them some time to kill you i would get witts end first

if they dont have any ap then i prefer to get malady for the ap instead of witts end because of the ap it gives you

Warwick is a very versatile champion so tanking is also a viable choice.
i build my sunfire first to cause some early game damage when I ult the enemy champion.
then i build my wit's end for some on hit dammage and for the attack speed after this i build full tank.

personally one of my favorite ways to build warwick is onhit. as you can see in my third warwick build i get alot of onhit items and a tiamat just for fun. the frozen mallet is to slow them when they try to run away after you destroy them with your dammage. at the end of this build you can either get blood razor or black cleaver depending on how you feel.

the only skills i think are useful for warwick are ghost smite and flash this is because i like to be able to jungle quicker and if i get ganked pushing a lane late game i can just ghost or flash away