I'll give you a little tip about defeating the Black ring. If you've got any skill points left over MAX out your own blind spell. If you haven't got any points left over, try and buy a book and then duplicate it.
Now for the tip; PAUSE is your best friend. Cautiously enter the room where the black ring member is, only enter far enough to trigger their dialogue. Stand still and wait for them to finish speaking. As soon as they do, hit the pause button. Now, hold down the SHIFT key and scroll the screen to their location. Then cast Blind on them (the game will automatically unpause when you cast the spell). Once an enemy is 'blind' they can't cast any spells on you. They'll just stand there looking bewildered. You can then easily finish them off, with a couple of hits of 'curse' (to lower their resistances) followed by 'life leech'. Leech them down to a sliver of life, then hit them with a long range spell or weapon. You should take them out in a matter of seconds and the poor buggers will never even get close to you or know what hit them.
Cheers <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />