Any best practices for Security / User group setup?

Summary

best practice recommendations on security/user groups

Content

We are looking at different options for security using User Groups to limit the requisitions that recruiters have access to.  Our concern is that we would still need several dispatchers to be able to assign the requisitions.  Do you have any best practice recommendations on security/user groups?

 

We currently load draft requisitions from another system that is used by HR.  Requisitions aren't typically created in Taleo.