I just got the first two corbums.
The dragon den was particularly hard this time, because as soon as I started dancing with one dragon in the main room, another one would soon start peeking out the broken door of the west room wanting to join the party. This kept forcing me to retreat to the corridor to stand toe to toe with one of the dragons (with the help of 3 or 4 shield potions and trying to quickly dodge any fireballs the dragon spit on the left hand side while trying to not flinch and turn when it was throwing a fireball on the right hand side) to avoid getting double teamed. I had to retreat upstairs multiple times to heal my wounds and top up my stamina, and to refresh my buffs and shield potions.
When all was said and done, only one dragon had been a good boy and remained in its cage the whole time. The rest were constantly trying to gang up on me.
With Halk, I also got particularly lucky with the random equipment, because with him I had found the boots speed in the secret room by Mongor's lair and diamond edge behind the gold key door in the ku path just below DDD (trust me pit). Those are the two items at the very top of my wish list.
Not having access to the fast stab attack of diamond edge (thus being stuck with the slower chop attack) added to the difficulty in this part of the dungeon compared to my previous run.
Next time I might try the recommended tactic of blasting them with poison bolts through the closed gates instead.