EBS 12.2. - Questions Using AME with iProcurement

We are once again considering AME for our iProc Requisition approvals but have questions. 

So:

1)  We do want to use the employee/supervisor hierarchy for the chain of approvers but will we still be able to add approvers into the chain like in iProcurement now without AME?  We currently use the Manage Approvals button to add approvers as needed.

2)  We have employees that have the same job title but different authority levels.  So is there a way to assign a level of approval authority to a person that can be used as the Authority Level just like a Job?  We are thinking of adding a DFF for each person that can approve but can we still use the employee/supervisor hierarchy with something like this?  We don't want to have to write the code to build that employee/supervisor list ourselves.