How to get 5.5k XP per kill

To get 5.5k xp you have to join in chaos boss and kill the
"Ultra Chaos Warrior" (Type /join chaosboss).

You will get 5.5k XP (Experience point) after you kill it.
If you use a xp booster then you can get 11k xp.
"Ultra Chaos Warrior" is very strong.
You have to stop attacking him when he starts absorbing your attack.
Or else everyone will die.

You should farm with a team.
This is the Fastest way to Level up for Non-legend (Non-member).