Every guild who takes ToD a bit serious maps the tower and use an external tool to log the scrolls from each room per floor. I find it very unconvinient to switch back and forth between the game and our map, which is a google spreadsheet.
The scroll info could be shown on the floor map, a tiny icon beside the room icon would be enough. Any time a room is defeated by a guild member this icon would show which scroll can be obtained from the room. Scouting still would be necessary but it would be much easier to share the information, cause it would be automatic.