I told you the Hall of Giants was in the Volcano. My bad, I think that it is in the earth cave.

I'd look around in the dungeons for bigger baddies. You are probably going to max out though at the rate you are going. I usually like to walk up and down the bridge leading to Tiamat. I like to fight Warmech (that his name?). he gives you crazy exp and gold. Thats fairly late in the game though.