The best advantage of encircling was to fight in place of defeated teammates. Wang Yu's 'Pillar Spiral' killed about 10 players with one blow, and the player from Divine Martial Guild kept filling. After a few rounds of that, the number of short-range job players was left with one last outer circle.
The players in the inner circle were luckier. Because they had their backs facing Wang Yu and could not see how their teammates died, they just thought that their teammate's shrieks sounded weird… Hence, these guys who were stabbed into their sphincter by Wang Yu's short sword did not bend their heads and expose their necks.
In the game, buttocks were not considered a vital part for points. While Wang Yu had almost killed the players in the outer circle, the players in the inner circle were still hugging their asses.