I recommend this items for WW because i know him better than you :P(im just kidding).So with your Frozen Mallet+Enchantment Furor+Blood Scent+Blade of ruined king+Red buff=You gonna slow your enemies about 80% and boost your speed about 82% so you realise that none can run away from you :D
Also with your ulti and the passives of your items you can archive tons of dmg.
Its very imptortant at early game to have AT LEAST ONE BUFF.
I had 2 pentas in a ranked game with this build and this was the reason for making this build at Mobafire.
Gg summoners.

If there like 3 or 4 ap carry on their team you should go for "Mercury's treads" with the same enchantment