The way you got Gully’s ultimate weapon didn’t turn out the way we wanted it to. If I could go back, I’d probably make Belevros sealed in the Waystation so it’s a fixed location, up on the top level, and also make it so you could get credit in your bestiary for progressing the quest or remove his first form from the bestiary entirely (it never sat well with me that people could miss that). The Deadwatch portion would remain the same since it’s a guaranteed room now. There’s a long and complicated answer as to why it ended up the way it did, but it wasn’t because we set out to make it that way to take several attempts to get. We had limited time and resources and tried to take advantages of locations and events we found fun and interesting. There was so much on our plate we had to do what was feasible.
Monika’s was one I was able to implement start to finish, planned from the start, so I’m glad that you liked it. The notes I got were to make it a scavenger hunt, so I made a little backstory to it and the lead designer set up how the fishing spot worked.
The final boss is a big step up in difficulty, but it’s balanced for the average player to have mostly max level gear and an ultimate weapon or two. If someone played every dungeon on easy and went straight to it, it’ll be difficult.