Doing the J5 Merc quest I came across this guy. Saved him for last because I figured a named would be tougher.
92 Ench + pet + J1 Warrior Merc, 82 Mage + EM8 AirPet, 92 Wizzy + J5 Cleric merc
After clearing all the frogs and other spiders I pulled him away from the big frog, Sent pets and merc to tank while three casters burned.
Took about 40 seconds. Total HP was 470,000. Saw max hit of about 3100.
Not as tough as I thought. All finished with 80+%mana and no deaths.