I have a Witching Hour belt with 9% IAS and my base Skorn with 1.0 AS. So in total I have 1.09 AS.
I use RoT, AC/AR, and bears.
I have the Zuni Helm with max mana and the Zuni set bonus of 20 mana regen.
I run a proc doctor build with no mana passives or active skills. My passives are SV, JF, and BM.
link to build - http://us.battle.net/d3/en/calculator/witch-doctor#WfRdYU!eXa!bcacbc
I use my active skills as follows: RoT, AC, then SH and bears if they mob me.
I have enough bears to take out the big rushes of monsters in Act III at the Fields of Slaughter on MP7.
So a low AS proc/bear build. Just another way to do it.