Unique boss w/unique mini boss, help me

I want to create a unique boss with a unique mini boss, for example Homer and Marge Simpson. It works the way I am doing it only if solo and players set to + 0.

What if anything can I do?

Rule 1: Marge must spawn with or very near Homer (conversation range).

Rule 2: There can be only 1

Rule 3: There must be a Marge, There must be a Homer.

Rule 4: Lets say Bart is the final boss here, so I need middle spawn solutions if possible.

I don't care if marge and homer spawn with others, but adding them to the equation has always resulted in either Homer + Multiple Marge, or Homer + multiple other, no Marge.

I have tried making Homer an ally that betrays but the same problem occurs, when set to single he appears alone, when set to easy you get multiple Marge with players +1.

Certain maps have the "back" be nothing more than a really tiny room. You can then set both unique bosses to spawn there, and fiddle about with the dialogue so it looks like they are having a conversation.

It is not an ideal solution, but I hope that helps.

What I wouldn't give for static mob/object placement.

You might try putting the Marge guarding an object that isn't a required objective. Put the Boss + object guarded by miniboss all set to back on a good map.

Maps are very important. With some you can even get reliable spawns on objects. Set up your mission objectives then run through the maps.