So far decided to finish up Shadowheart quest.
Spoiler: Quest spoiler
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Finally cheesed positioning by having Astarion (fastest character) initiate the talk, but seems to choose my Drow Bard and Shadowheart for some reason.
Said no and started a fight with me having two elementals as cannon fodder/crowd control.
Quickly choke them at stairs, and elementals did interrupt darkness spell spams…also Astarion casting vine floors and barrage did help along with hypnotic pattern.
Not sure if that’s a bug since Mother Superior seems to get auto knockout.
So got a bummer ending since I let Shadowheart put her parents out of misery.