I can understand that - from my limited playtesting, the ghosts might be quite annoying if you haven't found the binding sign. I definitely want to do something with this in the future; the options I'm considering are:
- reducing the total amount of monsters on this level;
- reducing the amount of lymph drained / leaving at least 1 lymph for the hero to not die from it;
- adding more options of dealing with ghosts (in addition to "irritating" them with saying dumb stuff).
If there is anything else you could suggest, I'll be happy to hear from you.