In the Tower of Doom, it’s well known that Luck, Fireball, and Heroism scrolls are guaranteed to appear at a certain rate across a number of floors. Valravens are also supposed to appear by a certain of rooms. These measures are sensible in the interests of fairness to different guilds.
This Tower of Doom, my guild has not found a single Haste scroll in the first 16 floors. I have never seen this happen before. In fact, we found a Heroism scroll before we found a single Haste scroll! While I concede that RNG is RNG and mapping mistakes can occasionally happen, I don’t believe that our level 900+ mappers can have slipped up often enough over 64 rooms to miss all of what should be a reasonable numbers of Haste scrolls. After all, we’ve found Luck/Fireball/Heroism scrolls at the usual rate.
For comparison, two other guilds in our family have found 10 and 6 Haste scrolls, respectively, in the first 16 floors. This variability in Haste scroll drop rates seems unreasonable because Haste scrolls affect the maximum number of rooms that a competent player with a given number of sigils can clear, and in turn the number of Valravens that they can encounter. From this standpoint, I believe that Haste scrolls need to be treated like Valravens, in that a guild should be able to find X Haste scrolls in Y rooms, for reasonable values of X and Y.
Here’s what our map looks like so far:
