I noticed people have mentioned Mallet over TF and it's absolutely true. Don't bother with rushing TF on Wukong as Mallet is just better for what he needs.
Generally I go:
Ninja Tabi ->*Double Doran's -> Phage -> Aegis of the Legion -> Frozen Mallet
That's core and from then on out it's pretty situational.
If you want to deal more damage:
The Bloodthirster, Infinity Edge, Last Whisper, The Black Cleaver, Trinity Force, Maw of Malmortius and Atma's Impaler are good.
If you need more survivability:
Frozen Heart, Randuin's Omen, Banshee's Veil, Force of Nature, Warmog's Armor and Guardian Angel are all solid options.
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