I cleaned the entire Drezen siege aside for the final boss fight in one single session without rests. Core difficulty.
Admittedly I couldn't do it in the beta, but as I said they tuned down things a lot after the release.

And whoever says that you are expected to rest after each fight in BG3 is full of shit, anyway.

Party control in Baldur's Gate 3 is a complete mess that begs to be addressed. SAY NO TO THE TOILET CHAIN