How can you add non-unique actors to scenes?

[yabo]

If I wanted to ask any diamond city guard how their day is going, for example.

I need a reference alias to add to the scene so that I can have a conversation with the actor, but you can't make an alias for "any leveled actor of a faction."

I've tried making an empty specific reference alias and using ForceRefTo to fill it, and then using that alias as the actor in the scene:

LeveledActorAlias.ForceRefTo(akSpeaker.GetDialogueTarget()) 

But that doesn't seem to work.

Anyone have any tips? I'm getting desperate.