It is cool to possess a elite mob, right?

Could you please explain clearer how you imagine the implementation to be? For example, should the player be able to configure the posession only based on the Rank or based on rank and entity type?

When I proposed this feature request, I originally only thought of configuring whether it can be possessed based on the rank of the elite mob, but since you mentioned the entity type, I think this can be added as well.