Not Updated For Current Season
Madreds Bloodrazor is a great item, though I'm not a big fan of it myself, the items you need to build it are not as useful as others you could be buying (unless you plan to jungle with razors), and I don't like the price tag of 3800. Starks Fervor is a great item to get, especially if your team is heavy on physical dps, if you don't see anyone else getting one, don't be shy to swap Phantom Dancer out for Starks. Bloodthirster... great item if you really need lifesteal, but if anyone on your team has a Starks I would continue with the core build and not bother with a Bloodthirster as well.
I myself will probably not use Beserker's Greaves for him as you don't need early game attack speed due to your Battle Cry (BC). Mercury treads is a great choice if the opposition are heavy in CC and casters.
Of course you can spec a bit more tanky with this champion, by getting items such as: