I have 7 Apps ( separated for departmental and audience) purposes and 1 exception triage app where unknown departmental items are first uploaded

the scenario where task/docs that are missing important line of departmental hence we dont know the department  is sent to the exception app for review, there a knowledgable person will decide that it is meant for Dept A(App A) or  Dept C (App C). So i created the Exception Review App and reached the point where i can collect the User's specified department and additional form data**. So now i have the intended App and data fields that i want to add to the target App's form and to start a workflow process on that newly added data in the Target App.

Problem is I don't know how to do so

1. Do I get a Java REST client to call the Builder API on each App - I have know how to call the builder api and start process externally - this seems to be the cleanest way
2.  Can the beanshell be used to setup/fill a form in a different app and start a workflow in that other app
3. do i setup each of the 7 forms in this app and fill the forms locally and hide the forms from the end user ( ie clone/copy the forms and table names from each target app - essentially sharing data across apps?