RE: Workflow Event/Response Combinations - Delete
Hi Romryan,
I think this is handled by code.
In C/AL there were 2 Codeunits created:
1520 - Workflow Event Handling / 1521 Workflow Response Handling
In those, we add the events to the library (CreateEventsLibrary/CreateResponsesLibrary) and set the Predecessors (AddEventPredecessors/AddResponsePredecessors).
I think in addition to your extension, you need to somehow add your predecessors preferences in there as well.
Then you may want to take a look into the Workflow Event Hierarchies, where you can define for each EVENT, what you want to allow as Response or not:

I hope it helps,