A beter way to map Entity-A to Entity-B

currently in order to map an entity to another entity I need to do the following steps:

1. Add all the attributes to the change action  (this could be automated)

2. Go into each attribute and add the entity I would like to map from (also automatable)

3. Enter the actually attribute I would like to map, this could be some kind of drag-and-drop UI, as all the values are known

Watch this painful gif of me populating 1 entity...