Wf fighter 18/ rogue 2. No blueprint.
Was 3rd try. (1st try 1 year ago boss hp 80%, 2nd try 1 month ago boss hp 60%)
Used up 100 repair serious wounds pots, 150 reconstruct scrolls, 49 silver flame pots (1 saved for safety at very end).
They nearly ran out on 80-90% Suolo hp, this is why the long completion time (could lessen the time 1 hour i think, which also cr*p time as not used PA on this run, and the last 20% was like a chess game).
No concordant opposition.
90% of damage caused by grazing hits and roll 20-s even on 82 beholder ac wo block and boosts.
Hardest part was when some barbazu, 4 elite orthon and the boss cased me together.
Some pictures (sry if too much):