I'd go train a few points into Swashbuckler for the extra damage. (I'm not sure if this is effective) Maybe train Vicious Charge. Witchdoctor I'd say isn't too great for other classes. I'd prefer Musketeer instead of Witchdoctor... (If you are going to go for Musketeer, use a Slashy/Shooty weapon that does damage from Strength [Then again, not many of those weapons are boosted through strength]). Hope this helped!
Dead-Eye Jeremy Wright Level 50 Dead-Eye Jeremy Wright Level 50