Hi avatar88343, I slightly modified your script
1. it no longer cast Voodoo at first. Instead, it cast it in the cellar
2. it also cast Grasp of the Dead to the monsters in the cellar
3. when no cellar is present, it cast Voodoo and Grasp of the Dead to ensure safety before leaving the game
4. the attacking loop to each enemy detected is reduced to 2
By the way, I also found the Firebomb with Ghost Bomb seems more effective
Here is the build:
Witch Doctor - Game Guide - Diablo III
and here is the script.
test.zip
Hope this helps!