Probaly missed some good points, but thats the basics of what i though was ok, il never solo with this and group with a full party, DoTs for the damage, big voodo to buff, and hex to help with damage and cc
I'm not gonna try and help you make a build, that's something you can and will work out for yourself as you've already included Soul Harvest (the only skill you can't afford to not take as a WD....theoretically). What I am going to point out is that Bad Medicine doesn't work in that build as you have 0 Poison damage without changing the rune on Locust Swarm.
As you level your gonna find which skills and rune combos work well for you and which ones you think are fun enough to just use regardless so there's no real need to plan anything atm.
This is what I want to try in group play. Started off as a lulz build to see how many exploding zombies I could make and still have a functional build. Haunt + Healing Rune seems to be the most powerful way to keep your WD alive and Vision Quest should make mana a none issue. I would consider dropping Pierce the Veil in Inferno for Jungle Fortitude or Gruesome Feast if you can actually keep that buff running (remember when your part mates pick up a health orb it works on you too so you don't have to run around like a mad man chasing red shinies!).
For more solo orientated play I think Zombie Dogs and Gargantuan might be essential but we will see.