Thanks for the discussion!
I just wanted to pop in and say that, in Patch 0.7.6, we will be both slightly increasing monster density in the Monolith of Fate as well as having the Monolith of Fate no longer offer modifiers which are already in effect. Additionally, new modifiers will be getting introduced.
I’ll speak with the team about both a (potentially very rare) monster density-related modifier, as well as having periodic increases to monster density built into the Monolith of Fate itself.