This is my current build: http://us.battle.net/d3/en/calculator/demon-hunter#acYdfT!ceb!bZbZbZ
I'm ALWAYS playing with my brother, he's a barbarian, he only died 3 times! He usually leaps and do hos aggro thing + a snare (stun?), then from afar I basically Rapid Fire until I'm out of Hatred, and replenish with Hungering Arrow, and so on... and that's when it's easy! When they start heading for me, then it's Caltrop time, Vault and I try the usual routine again.
Thing is, I've noticed whenever any mob hit me, my health basically drop per 20% to 33%... I can maybe take 3 to 5 hits before I'm dead! I currently got:
Giving me: 1338DPS (which seem more than enough atm)
Any insight guys? thanks