This is currently my build for Sun Wukong the Monkey King. This is my first build on Mobafire.

Wukong is a really fun character if used properly. Wukong has a great ultimate for initiation and his E and Q can do massive damage if used correctly. In early lane game, I usually would back off a bit near the turrent and if the enemies are close, use your E-W-Q to damaage him. If you feel you can kill him after using that skill sequence, quickly use exhaust and kill. Mid-game I usually try to help mid or top if my allies or dying or if the enemy is dying and they need a gank. Wukong is a great ganker with his E, R, Exhaust, and Phage. Late game, I usually let my teammates to initiate a fight and I would come in to ult to keep the enemy team stunned.

Currently, my runes are Greater Marks of Desolation, Greater Seal of Evasion, Greater Glyph of Focus, and Greater Quintessence of Malice. I might change Greater Seal of Evasion for Health instead.

My masteries are 1/21/8. I feel getting 21 on defense is really good on Wukong because he cannot die if used correctly. 1 for Exhaust on Offense and 8 for Utility

Early game, I get two Doran's Blade and either Mercury Treads or Berzerker's Boots. After I get Brutalizer and Phage. Next I get Sheen,(If I chose Mercury Treads, I would get Zeal instead). and finish Trinity Force. After I get Atmas and sell one of my doran's blade to get Banshee's Veil.(I sometimes get Warmogs instead). After I get Bloodrazor and Infinity Edge if the game takes too long.

My skill order would be E-W-Q-R or E-R-W-Q. I like using exhaust on range characters such as Ashe, Malzahar,or Annie after using Wukong's E to get close and then using my ultimate to finish the work.

Flash and Exhaust are one of the best on Wukong. I would also consider Cleanse and Ghost.

Pros
Great Initiator
Amazing ganking ability
Escape
Damage early game

Cons
Very little damage late game
Needs a ton of gold
Can die easily if not played correctly

The only defeat was when it was 4 vs 5. We should have won that one :/