Ive for a while been intrigued the passive:
Whenever you are healed by a health globe, you gain 10% of your maximum Mana and 10% Intelligence for 10 seconds. The Intelligence bonus can stack up to 5 times.
From a glance through the WD's skills, only the following 2 abilities can generate Health Orbs:
Grasp of the Dead
Death Is Life Enemies who die while in the area of Grasp of the Dead have a 5% chance to produce a health globe
Summon Zombie Dogs
Final Gift Your Zombie Dogs have a 15% chance to leave behind a health globe when they die.
Which is not much compared to what the barbarian sports in orb creation, but thankfully the Witch Doctor is well equipped to make heavy use out of their zombie dogs.
At a glance, it seems a sacrifice based build might be the best bet to generate extra health orbs, with skills and passives devoted to rapidly summoning and sacrifcing dogs, proccing more to constantly bring in new dogs to blow up for a constant stream of orbs to uphold the damage buff.
I call this the Doggoneit build
Skill 1: Pllague of Toads - is for when low on mana or you just need to SPAM to kill large numbers of foes when nothing else is left, which is why I choose the Rune of toad affinity
Skill 2 Zombie Charger runed with explosive beast is both for thematic reasons and to have a powerful nuke spell as a mana dump. Plus, who knows if the explosive dog might gain the ability to drop health orbs?
Skill 3 Summon Zombie Dogs with final gift to have a chance to pop orbs on death
Skill 4 Sacrifice, runed with next of kin to increase chance of dropping orbs
Skill 5 Confusion runed with devolution to gives you a boost in explodable dogs for a short moment
Skill 6 Hex runed with Jinx for extra damage and making your frequent sacrifices into truly apolcalyptic bursts.