Kind of hard to answer question one without more info, are you looking for a pure DPS build or more of a tank build?
As far as question 2, you have to kill a lvl 37 elite in the WW question. I did it as a lvl 34 DK with no problems. The werewolf gets a scare ability that makes the elite run away which gives you some free hits. I'd guess anything below lvl 28ish would be a challenge, not impossible but might be tough