The trick to the Dank Crypt is to forget about disarming, instead detect first floor mechanism that can be detected as you first enter the Dank Crypt from the inner main doors.
If detected (and you want to make this detection/perception check), nothing else needs to be found or disarmed. Place a standing vase on top of the mechanism which disables it.
Open the coffers around the room, even unlock the main door (if you want - I don't) out to the beach area where Shadowheart is when you initially meet her off the Nautiloid.
Go to the area in front of the center crypt (otherwise known as the central sarcophagus) on the side where you detected and disarmed floor mechanism (again, by placing a standing vase on it) which should allow for a straight line get away to the main inner doors to escape once you open the center crypt/central sarcophagus (grabbing the Watcher's Guide and Engraved Key) and the game should go into turn based mode. Once you have grabbed loot, exit. Once out, turn off turn based mode.
Last edited by bullse; 09/01/21 10:36 AM.