It's that time...
I failed pretty badly though. I drank all my potions in just a minute and barely did any damage do Duriel. After asking jsp for help I stacked up on Thawing Potions and that did the trick.
So far I've been playing with level 1 Concentration aura by the way, and I think I will start putting some points in Holy Fire for better damage.
Anyway, Duriel is down now!
Took only 3-4 town portals...