Okay! First combat of the campaign was interesting. The party of four arrive in an antechamber and are looking at the doors to the tomb. I used the Fire Beetle stats for Kruthiks, just removing the flame gout.
They attacked the party from four holes in the walls, emerging one at a time to a total of 12, only one or two attacking anyone at a time. Half the party nearly died. They made their first camp outside the doors of the dungeon in order to heal enough to enter it.