I have created a workflow 2013 and now I find that I need to use the Impersonate step in workflow 2010. I need to run the Impersonate call in the middle of the workflow process. Both workflows use the same custom list. I know that workflow 2013 can call workflow 2010, but workflow 2010 can not call workflow 2013.

Thus I am trying to determine if there are any alternatives to that I can use the impersonate step in workflow 2010.

Thus I am wondering if you have any suggestions and/or if you think one of the following options would work:

1. Making the impersonate call in workflow 2010 a resuable workflow.
2. I can have workflow 2013 call workflow 2010, but workflow 2010 does not return back to workflow 2013. Thus is there some kind of a way that workflow 2013 could start again? Should I have workflow 2010 change a value on the custom list? Thus workflow 2013 would just wait until the value is changed in the custom list.
3. Could I run the 2 workflows in parallel?
4. Should I  write the entire workflow totally in workflow 2010?
Thus can  you tell me what option you think would work and how to accomplish the goal?