How can I force a named boss to spawn with Escort?

I'm making a mission the requires you rescue a person before the bad guys finish a ritual to trap her soul. I want a custom named boss to be the leader of the group that is performing the ritual, even if he's by himself.

It's an Escort mission objective, because you need to get her out without getting her killed.

What I've tried so far:

Made a custom group with one member, an Elite Boss that is the named - This resulted in a full group of elite bosses spawning. (And boy, was that painful!)

Added minions to the above custom group - This made only minions spawns, regardless of what difficulty I tried the mission on

Moved the Elite Boss down to boss level and left the minions - Only minions spawn, regardless of difficulty

Removed minions - A group of named bosses spawned.

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Secondly, I want an Ambush to occur as soon as the escort group is cleared, so that they can charge in and try to kill her before the escort can be led out. Exactly which condition should I set for this, as I've tried both of the options and neither seems to trigger until I get the escort to the exit.

set the spawn for when the rescue part of the escort is completed. as for the single boss, i dont think you can do that yet without having it spawn a ton or having it as a "defeat boss"

My best suggestion? Change it to a bank map, make her into a collectible object (there actually was rumoured voodoo practices in the 1860's of killing young women and girls inside wooden barrels to keep from making a mess beyond what the ritual called for.) the bank can have been built upon an important location/landmark/fey line/Axis Of Pithia and cleared of civilians prior to the event.The barrel can have all of her dialogue, and you can explain that she was/is too weak from their treatment to walk out of her own accord.

The bank maps only have one floor collection spawn point and it is always inside the vault, the boss will reliably spawn almost directly in front of the vault, making it almost impossible to rescue her without fighting him.

Sure, it's not as exciting to stop a ritual about to happen, but y'know.

You could also try making her a defendable object.


Just suggestions though, and this will fix your ambush problem.