Styrax Fluorescene

Strategy
This fight consiste of 2 bosses linked. After clearing the room, the Boss will become aggro. Under the Red Trees, your DPS will gain 50% but decrease your armor and resist by a huge quantity, and a Dot will down your health. Under the Blue Trees, you'll have a [buff].

Begin the fight with the Flower Pet, as it will heal the Treat, otherwise If you have a mezzer, let him mez the Treant. Fight them on the road (neutral zone). The DPS should be under the red trees. After killing the flower, the Treant will become hungry. Fight him in the neutral zone too.