I worked my way back thru saves, and I was able to unstick this quest.


- Lae'zal jumps to the control orb and lowers the cage 2 turns before it collapses,
- Mayrina leaves the cage 1 turn before it collapses,
- Hag dies before cloning Mayrina, same turn the cage collapses,
* Mayrina is still standing on the ramp to the cage
- Loot the workshop after killing the hag, before speaking to Mayrina,
+ Select Shadowheart,
- Use the portal,
- Talk to Mayrina


Without the '+' item, it still didn't work, but going back to my previous saves it still didn't work, so the '*' item might be the decider here or something, but I'm done with this quest at this point, thanks smile