THIS BUILD IS MADE FOR 3V3, NOT 5V5.
This is the build I use with WW, it works pretty good, as long as you don't play ******ed. Just remember to harass, but don't over commit. Play aggressive, but smart. With this build, farming is hard until ~level 3. But is easy to do from then on. Other then that, just try it out a bit, and see what happens, I find that it works really good ~90% of the time.
Pick whatever runes/masteries you prefer.
Also, feel free to change the heal on the summoner spells, Ignite works well also, but it's all up to you on how you want to run all that. I just wanted to show everyone what items I use with WW, and whatnot.