So, since the topic has been almost 2 years and the problem remains acute. Since the previous advices (to close \ sell Torture room or cut way back in the Lair) are not suitable for all maps \ campaigns and therefore are not a universal solution.
Therefore I want to ask about changes in future versions KeeperFX. Planned (if it possible) is to adjust AI of creatures with Teleport spell for more appropriate behavior at during the battle?