I discovered that you can send one of your weaker characters to trigger dialogues with NPCs, then switch to the rest of your team and freely loot the room and kill a couple at a time because the others are frozen in dialogue.
**Spoilers but tried to take out details to not ruin the story for anybody**
Two examples you can test:
1.)
When you pull the lever to expose the hatch door under the shrine and go underground to find the hound master torturing someone he calls a traitor, you can trigger dialogue with one character and use the other 3 to kill an archer and a soldier without the others aggroing. You can then move around the room killing everybody and looting everything except for the hound master and then heal up before attacking him.
2.)
When you teleport up to let that ladder down to get into the monastery place and the chat triggers with the guy who demonstrates the cure, you can leave one character in dialogue with him and use the others to go around the room killing everyone that doesn't have a dialogue bubble above their head.
