There is currently only 1 LoN barber build Witch doctor ranked 23 in the non seasonal leader boards. Everyone else is pretty much Arach Firebats. Rather than copy his build, I'll be focusing more on survival and ease of game play.
1 major difference is right after reviving, I won't need to spirit walk in for Soul harvest buffs to regain toughness buffs, I can simply horrify and get the fight started. Caster Wd being the most challenging game play beckons a build that allows more room for error to improve on.
For the amulet slot, you might want to just go with the Eye of Etlich for Range dmg taken reduction rather than gamble endlessly for an ancient hellfire amulet with jungle fortitude.