[TheGentleman]

I play a WD =D, so I thought I'd post up my build.

Left Mouse: Plague of Toads; Rune: Rain of Toads (AoE)
Right Mouse: Grasp of the Dead; Rune: Groping Eels (AoE DoT)
1: Horrify; Rune: Phobia (Increased fear duration)
2: Soul Harvest; Rune: Siphon (Heal)
3: Acid Cloud; Rune: Slow Burn (AoE DoT)
4: Big Bad Voodoo; Rune: Ghost Trance (Heal)

So you may have noticed I like AoE. For maximum damage output I cast the following (preferably off of 5 stacks of soul harvest):
Grasp of the Dead (reapply when possible) -> Acid Cloud (reapply when it wears off) -> Plague of Toads

P.S. WD has to be one of the best classes, I mean who else would summon a gigantic toad which eats people or vomit all over the enemies in the midst of battle. At my Diablo 3 mini-LAN the WD certainly got a good laugh out of all my friends.