Hi Jacob,
I think we are talking two things here:
1. AOT type are used to create handlers and determines its parameters.
2. Event types are captured to specific event occasions and classification of the events based on like FO creation, FB creation, Item level changes, planning status changes, planning changes etc.
So, you have to configure those event types and set relevance function to trigger according to your scenarios item level changes, planning status changes, planning changes etc.
Regards
GGOPII