Notes:

Quick Dungeoneering definition from Runescape wiki: Dungeoneering is a support skill that consists of exploring the dungeons of Daemonheim by solving puzzles, unlocking doors, fighting monsters and Bosses, and uses most RuneScape skills to solve puzzles to ultimately survive its depths… Unlike other skills that are trained alone, players can cooperate to train in groups of up to five people, receiving the most experience per dungeon, although soloing is possible and widespread.

TLDR: Think Dungeons & Dragons for Runescape.

Some Teams are very picky, and soloing was much harder back then. The final picture seems to depicts Mysterious shades (Vengeful spirits of ones who died within Daemonheim.), with a Guardian door, signifying that he needs to defeat all those shades to advance to the next room.