Do you mean for PvE or PvP as their are different things to focus on
Accuracy and Dodge is always good for a witch, elusive helps with dodge
A great start for both PvP and PvE is getting the gear from the multiplayer chests in moo tower, if you are fast enough the chests with 4 locks contain gear inside which give 2 witchdoctor powers each
For example you could receive boots which give you Jobu's Kiss and Mournsong