I'd say you got really unlucky on that one being a boss assassin. Maybe drop that dungeon and do another one if you aren't strong enough
Viewing post in How should I go about clearing a bandit fort?
I've found a solution that I think is unintended cheese, the spell Intimidating Presence can be used to skip miniboss fights which initially when I used it I thought I'd get to skip normal fights but still have to do minibosses so I was using it in a ancient jungle and turns out it also skips minibosses. Thanks to that I was able to clear the dungeon with ease but I do feel like it being infinite use and letting me skip minibosses is op, especially for how low cost it is.
Also some unrelated things I thought I'd also mention, I think the advanced slave requests are often too easy. While it is mostly rng, a lot of the time I'll get an advanced request (ones paying 6~8k) that are just "15 sexual proficiency" which I think is way too easy. Because of easy requests like that its made getting all the gold needed to clear debt trivial. I think all the advanced requests should require a proficiency training so its not possible to do almost all the requests for the week, and maybe also a class. Also I love the rework to combat and training.