My WD build for hell/inferno:
Core of this build are pets, that are tanking enemy monsters from hurting shaman (Dogs + Gargantuan). Supporting spells are Mass Confusion with Big Bad Voodoo that increase damage allow crowd controll. Main damage spell is Firebats with Acid Cloud support.
For passives I picked skills that ensure survivability both of my pets and me.
How to play:
Spawn your pets. Allow pets to tank enemy monsters. Cast Acid Cloud and then mass cast Firebats. In bad situations vs harder enemies use supportive spells to fix your porblems.