Mostly fair, but tiers did have a slight other impact in that they were used to bias the final room: Clay Golem and Hag were equally more-likely to be in the final room, both less so than Dragon and Steel Golem but more so than Orcs and Boulder Trap.
Mostly fair, but tiers did have a slight other impact in that they were used to bias the final room: Clay Golem and Hag were equally more-likely to be in the final room, both less so than Dragon and Steel Golem but more so than Orcs and Boulder Trap.