The issue has been resolved, after the latest patch (v.209). The game doesn't crash anymore on any of the encounters I listed above.
"Fixed an issue where the client could sometimes close when the character dies." - quote from patch notes, I think …
Just after posting the latest post, I managed to find that the Shaolin temples quest at floor 5-6 where you turn into that golden statue, and if you get hit by throwing star, turn into your normal form, crashes just like bosses! With the sound of th…
These crashes has occurred on my Dark knight. So i first thought the Final Pact skill might be the culprit (it causes all other kind of crashes that I'm too lazy to get into right now on this discussion), but then I tried same bosses with having it …