Gralkor
will give you trouble when you meet him, but only because you aren't very
strong at that point. Try to keep other people in front of him so
you can wear him down with spells before you try to take him out.
When he approaches, concentrate your fire on him. Don't miss the
nice weapon and armour he carries - a +2 Fine Spear and some Brigandine.
These will help you out a lot early on.