Right now I've been playing with Mundo and I love him, I just need to figure out a good build for him. any suggestions?

AS marks, HP/lvl seals, HP/lvl quints, flat CDR gliphs
9/21/0 masteries
start dorans sheild
kindle gem
boots
spirit visage
giants belt
merc treads
warmogs
atamas
force of nature
win

try jungling him - its way better than laning

(which means armor seals but the guy above me has the right idea)

**my last suggestion is frozen mallet instead of warmogs, but ive always said that**

(and some people like wits end on him if youre doing well and can get it early the dmg is really surprising because the atk speed lets him abuse his insane ad steroid)