A viewer as if the floor 11 boss could still be soloed after the latest update, which Deltaclimber did not even know about. This video shows and explains changes to floor 11 from this update around August 20ish 2022. Also, Deltaclimber shows more than one way to solo Saurus with the help of another player, AirMolecule8. Watch and see if these tactics can help you. Enjoy