The Main Plot dungeon tested the whole team, not just a single player! The Epidemic Pond was all the more so as it not only tested the team's battle strength but also the strength of those behind it, such as Potioneers, Enchant Masters, etc.
The last phase was the stage where almost all the Battling job players would be tortured so badly that it would make them beg and scream "no more, no more"!
Not to mention Berserkers, even if it were expert Shield Specialists like Mixed Breathless, they would not be able to endure one hit from the Boss. Lei Zhika, after it was enhanced, its attacks would deal over 2,000 points and ignore one's armor. The attacks also had splash damage, so it was literally a humanoid meat grinder!