i do not take credit for this build, simply provide build info from wukong monkey king spotlight video without you having to review it every time.

credits:
-http://na.leagueoflegends.com/news/champion-spotlight-wukong-monkey-king
-http://www.youtube.com/watch?v=k1zAhC5aeQs

-solo top, mid, duo both ok!
-very flexible champ; intense juking or annoying enemies and escape with W. Hit and run with E > Q > W. Saving teammates or team fight with R.
-very sustain champ due to runes build; armor, MR (magic resist, and health regen Quintessence.
-skills have short cooldowns and mana cost, meaning u don't have to focus to build a glass canon, but focus on defense to survival instead.
-the reason to not focus to build a glass canon because of his R, u may get burst down when while using R.

Doran's Blade
or Boots and 3 health pots

wukong's skills have short cooldowns and low cost mana, so don't try to build a glass canon and abandon his flexible skills.

Normal combo: E > Q

Hit and Run: E > Q > W

E (nimbus strike) also and be used to target a creep to get out if W (clone) is on cooldowns or when u don't have it at level 2.
so with that, u can come closer to use Q > E to back off again.

W: try to master this skill. By mastering, u don't have to exactly use it, but trying to confuse enemy, tricking them that it is a clone (though it only work 1/100 times) haha

R for team fight. R to rescue teammate. R to get away. R to kill.

Q > Q > Q

-last hit

-use E if enemies is close to the creeps, W to get out
like i said wukong's skills have very short cooldowns and low mana cost, so try to use the best out of it. (If u care about mana, max out Q first rather than E)