29 druid, first time i went for him he spanked me, he has a buff that increases attack speed 100% and increases dmg. not alot of people my level on server... so i tried again. This time - entangling roots times alot. it doesn't do much dmg but eventually i killed him. only time he hit me was when he resisted 2x in a row. not a fast way by any means but it worked.
entangle - wait for it to break or almost be up - entangle. 5 second rule meant i on avg regen'd more mana then cost of entangle each time.