You can create a Macro with the following commands:
Direct Offline Processing - Bank #
Direct Offline Processing - Favorite #
Direct Offline Processing - Apply
File Close
Bank # … 1-4
Favorite # … 1-9 (per bank)
You can then assign a Key Command in order to execute this macro.
If you wish, you can execute a total of 36 DOP Favorites via key commands in this way.