Ok, let me put things into a better perspective.
- If i use my guild as example i’m usually the one mapping out all rooms since i’ll finish all upgrades for my Doom Weapon and have plenty sigils to spare anyway.
- But if i map out all rooms on, let’s say, four floors it means any alt account from our guild could join, beat eight battles (unlock scroll room + boss room on each floor) and it would give our guild four extra Dooms.
Doesn’t sounds like a huge time investiment for the sake of extra score. It does requires more guildmates to make it worth in the end, but highly organized guilds can pull that, and minor guilds who are falling short of some rewards could do it too.