I tried to give this skill another chance a few days ago, and was completely amazed at the damage. It hits about as fast as my direbats, but gives close to twice the attacks per second I would guess.
You're going to run into two problems trying to make the skill viable-
1. The mana (Witch doctor staple with any cool build)
2. Survivability
The only way to fix the mana is Vision Quest, but vision quest causes your survivability issues to be magnified, as you are basically face tanking the monsters with no cooldowns. I tried running the 5 cooldowns / no primary to hopefully smooth this out, but not having a single ranged attack can be pretty painful against certain monster types.
Combine this with the fact that certain mechanics are just not meant to be tanked (Fire chains / desacrator / even big windup melee attacks), and I ended up shelving the build.
I know there are a lot of LOH builds out there, so if someone with that gear wants to test it out it could be interesting. The only way I could see it work is with an absurd amount of damage - enough to drop packs in the span of spirit walk / spirit vessel, but at that point, well, just about anything is probably viable.
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