Boss tanked in middle of pad if possible. Shock AOE. For this phase boss should be debuffed with Low Slash to reduce AOE damage and damage from projectiles. Ligtning Phase. Whole group will get constant damage unless they hide in one of the four safe spots. Its nice to Low Slash boss when people have to run far. They can spawn either at entrance, exit (bridge), left side or right. Its random. Tank runs a little ahead of group to keep boss in place. Shock AOE comes right after. Debuff. Attacks repeat until boss is dead. Simple pattern..

As found on Youtube