I am playing this on expert (master), and I am stuck. I have completed all objectives other than finding the bloodstone.spoiler:I am pretty sure this must be behind a large metal door in the pillared chamber with a balcony surrounding it. I am pretty sure this door is opened by shooting a water or gas arrow at the "eternal flame" high in the central pillar. I can't find any water or gas arrows, and they aren't available at loadout. Note that the objectives on expert are different -- there is only one skull to find, so I guess that room contains the bloodstone, not a skull.
Am I missing something?
In response to Lady Jo's problem, I eventually found some rope arrows. Before I found them, I got up into the area mentioned by Nightwalker and looted both treasure rooms by stacking crates and zombie torsos. I could not get up to spoiler:the horn because there are not enough stackable items in the map.
It is so much easier with rope arrows!
The rope arrows are locatedspoiler:on a dead body near the entrance to the cave area that contains the wood beams.
I agree: this is definitely one of the hardest missions I have played. Expert seems to have a lot more AI and things to do. It was a real challenge getting rid of AI without a BJ and with a no-kill objective. The method I used was mainly tospoiler:do a lot of running and hiding and to lure guards into fights with undead. Killed fire elementals with my sword.
Sperry and JIS have a lot in common.