Well, the main problem I see is that your weapon has extremely low average damage. Shoot for a lower attack speed and more consistent damage from a mace or spear. Also you can improve your gloves a lot - look for 200+int high crit chance and crit damage. Attack speed is not a beneficial stat for a witch doctor. You would prefer to do more damage per hit.
Get a better helm. Andy's is terrible for a WD (artifically inflates your sheet DPS but lowers actual damage per hit compared to 200+int cc Zunimassa's Vision.)
I would shoot for 4pc Zunimassa bonus.
You have 60% increased attack speed and as I said that is not in any way beneficial. Firebats is pretty bad overall, Acid Rain is better - more AOE and more damage if you use the method of maximizing crit chance and crit damage.