Love these, especially the corruption one. Anything that incentivizes more aggressive play.
Here are my ideas.
Boss rush
Monstrosities come in pairs and are much more frequent.
Lights-Out Normal
Lights-Out as a standalone without the increased demonhost spawns. Can be mixed with other modifiers such as Specialist Gauntlet.
Honestly, the reduced visibility range on enemies is so great that you can actually stealth on it if you don’t shine light everywhere. Should be made a stackable difficulty mod together with ventilation purge similar to how high and low intensity works.
Hunt the Wicked
There are 2 demonhosts spawning on the map instead of bosses. Their AI is slightly tweaked so they don’t just attack the same player until it’s dead.
Killed demonhosts drop grimoires that you can pick up and discard to clear some corruption (you can already do this in the game) or bring it with you for greater rewards…
Unpredictable Circumstances
At certain parts of the map (broken down by no returns or events) different other modifiers become active. One might be lights out, the other part starts to spawn a lot of specials and then a double boss spawn.