Cinderhulk or Devourer on WW?
Assuming for a 2 offensive item build, I'm not sure which is best. I would think Cinderhulk/BotRK/Wit's end would give lots of on-hit damage plus defense.
2 Comments
I use devour/ruined king/wits end with furor enchant on boots. It leaves you squishier, But I hate it when people call warwick a tank: he has no CC outside of his ultimate, in fact he's actually a lot like garen in that he has no meaningful way to force them to pay attention to him at all. Grab a blue elixer for towers since your on hits don't all apply. In truth though, most of my warwick games recently my build hasn't made much difference: either my team won the 5v4 while I was farming and just didn't need me to be a carry, or they lost so hard before I hit 6 (we're talking team scores of like 1/12) that it just didn't matter.
Devourer is great on warwick, but underpowered as an item currently so I would avoid that at the moment. If you want a really durable build, I'd go for cinderhulk into BotRK or Wits, get more tank items, and then if ahead, get whichever on hit you haven't gotten yet or just finish going full tank.
I personally love AP Warwick, and you can hybridize between an on-hit build and an AP build by doing something like 
for a rather squishy build but with lots of sustain, excellent magic DPS, max CDR, and several active CCs that are a great help to WW. It isn't incredibly reliable (if you get CCed and bursted your kind of screwed, but then again only a tank isn't screwed in that scenario), but it's hella fun!