"i just went on like Boratus was still alive..."
That's funny. I would have thought being dead would interfere with his work. <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
The Tingalf/Marcus quest is relatively easy to partially break, though even then you should get most of the experience for it.
You can kill all of the mummies. Even at lower levels, if you advance slowly the ones in the hall come a couple at a time, rather than all at once (unlike the ones in the back room with the alter).