1) I could do it in a lot of playthrough with Druid, Sorcerer, Bard and Barbarian. Most with Lae'zel, Shadowheart and Whyll in the group. But I have activated the "Weighted Dice" feature.

2) The last time I did it in the way is serval patches ago. There Ethel duplicates herselft two times.
Maybe you can select the option to knock out the enimies.