Well, I've been doing theory, but procrastination is easy and usefulness is hard. Current ETA: Heat death of the universe.
Progress so far:
A weak chamber which can be quickly and basically built. Provides very little !!FUN!!, although needs another use to keep it relevant.
A stronger chamber which provides greater information and a good amount of !!FUN!!- probably needs another hook too.
A chamber dedicated to psychological torture - less !!FUN!!, but great information capacities.
A chamber of maximum !!FUN!! where you can give Warlocks proper bonuses - but good luck getting info out of anyone.
A humiliation chamber where the warlocks get minor, long lasting bonuses, to skills for example.
Some of the could be merged or removed.
A variety of instruments - need names and effects, although I'm thinking:
2x regular conventional torture instruments.
1x regular torture instrument for max !!FUN!!.
2x magically imbued torture instruments (perhaps needing souls?).
1x magically imbued torture instruments for maximum information.
A variety of maps - some real, some wrong, some fake (trapped).
Travelers - surprise the nomads - easy slaves, little treasure. Maps one use.
Merchants - ambush a convoy - easy money, easy slaves. Maps one use.
Armored convoy - jackpot - lots of materials, few slaves. Maps one use.
Town - Town raid - standard torture award, easyish slaves and treasure, moderate rewards.
Any suggestions? Lots and lots here.