You rock!
Did you remove every Adminhtml area via $ find . -iname "adminhtml" -type d -exec rm -Rf {} +
?
Running a backend-less version of Magento saves you processor time, space, speeds up your store and improves security. All missing required adminhtml files will be transparently mocked. Nothing to configure!
You have two solutions:
(1) If having multiple servers: Make sure that you connect only via SSL encryption to your MySQL server. Someone is spying :-(``
(2) There is currently a feature missing in n98-magerun https://github.com/netz98/n98-magerun/issues/309 that you cannot configure Mage:run()
to use a custom configuration model as explained below.