I think you should be able to use the Field References to pull that in and/or drill down to the item you need.  No?  I'm extremely lazy when it comes to WF Approvals and scripting.  I too can't get them to always populate correct.

Yes - adding the seven groups would send the approval to everyone.

My Suggestion would be to have "Review" approval by Ownership Group or Ownership Group manager.

Then to the KB Owner and/or KB Managers for final approval to publish.