http://us.battle.net/d3/en/calculator/witch-doctor#aZUiXk!ZWV!aaabYaImportant gear stats:
Voodoo mask- mana regen / int / vit ( allresist/max mana/armor/life regen)
Amulet- crit hit chance / crit dmg/ int (vit/allresist/loh)
Shoulder- int / all resist / vit (armor/life regen)
Bracer- crit hit chance/ int / all resist (life regen/armor/vit)
Chest - int / vit (all resist/ life regen/armor)
Pants - vit / all resist / int (armor/ life regen)
Belt- int / vit / all resist (life regen/armor)
Rings- crit hit chance / int / vit (crit dmg/loh/life regen/asi)
Gloves- crit hit chance / crit dmg / int (all resist/vit/life regen)
Boots- all resist / int / vit (movespeed/ life regen/ armor)
Ceremonial knife- mana regen / life on hit / crit dmg ( int/ vit/ str / socket/ max mana)
Mojo - crit chance / mana regen / vit ( int / life regen/ max mana)
These are just the main stats to be looking for on each item. If you're ballin go the extra mile and get the additional stats in parenthesis.
This is the build I currently use on my WD. I didn't/couldn't go all out on him but I spent around 15m on total gear.
31k dps / 35k hp/ ~500all resist / 37%crit hit chance / ~200% crit dmg / ~40 mana regen /740 max mana/ ~500loh
With these stats I easily complete acts 1&2, at act 3 currently haven't tried past stonefort yet. If there are any questions
Or comments feel free to post! I would like feedback