[Barlik Longbeard]

Right, some really kick arse tactics are:

1. As ChoCoMoBo said lure the trolls out individually. then kill them.
2. Once they are dead line up your fighters by the south western door and your mage with a dispell magic at the ready.
3. run into the room, engage in conversation with the Yuan-Ti mage, then run our.
4. The mage will cast stoneskin, protectio from blah blah blah... and then follow you until he can see you.
5. When he is in sight, or just out of your vision, cast dispell magic on him. This will remove all the spells he cast on himself so that you can kill him really quick.
6. then run in and kick some arse.

Glacias is the Bodyguard of Lord Arnise. And the secrate door to him is in Lord Arnise's room on the southern wall. Then follow the passage to another secrate door and through the door in that room is Glacias. He is tough to kill (full plate armour and bout 120 hp) and fast (he is hasted or something). Put all your guys onto him. Then do not go down the stair case in the Yuan-Ti room cuz that leads to the roof of the castle. There are a few secrate rooms leading off from Nalia's Aunt's room, along with a few golems who become hostile if you steal the stuff in the chests at the end of the room. If you are gonna steal this stuff, then kill the golems individually, except the iron one, unless you think you can take him on. The go down the stairs in the adjacent room. Lots of baddies down there and that is where you put the dog stew to use.