My favorite way to tackle these rooms requires a little prep:
- Stand back from the door and throw a random object to keep it open
- Step on a swiftthistle or otherwise activate hourglass trinket to freeze time
- Toss a potion of paralysis into the centre of the room, immediately followed by a potion of toxic gas and then a a liquid flame for good measure
- Wait for time to come back and watch the damage meters/kill messages go brrrrrrr.
If all goes well, you should only have one of two stragglers left at the end to finish off, if at all.
Hoo boy, I can't wait to see how the State Department try to spin this one.
Edit: who am I kidding? It will be "Israel has admitted this was a mistake and we believe they remain committed to minimizing civilian casualties".
Edit2: Ah, no. Turns out they instead played the "We are waiting for the results of Israel's investigation into its own actions" card. Was a 50/50 chance.