I was wondering if you could skip the whole "free the witch" part. If you free her, she will give you a ring that you need to show the hidden servants in Hunters's Edge so that they hand over a note and a teleportation crystal, but apparently you can just as well kill them and proceed.
If I am not mistaken, Hiberheim only has 2 starstones (iron maiden + treasure room), so that would still be enough to enter the temple.

Last edited by eidolon; 25/07/14 10:47 AM.