Invisible Demon Hunter Build submitted by Tommy Gun.
This is a Demon Hunter build I've been using. It has worked really well for me in avoiding almost all damage.
The Build: http://us.battle.net/d3/en/calculator/demon-hunter#WQVXTY!bfe!YbbZZZ
The key is to stay in your smoke screen almost 80% of the time when attacking.
Using bola shot with bitter pill, batt compainion, Multishot suppresion and preperation all granting discipline this enables you to stay in smoke screen for almost all attacks.