To all vocations it is heavily recommended to wear a Dwarven Ring because you may exit the arena by mistake or not be able to reach the next pit if you are heavily drunk (note that drunk lasts for several minutes so you will be affected in the next pits as well). Druids and Sorcerers: Use Magic Shield and use SD while running to kill fast before he summons. Knight: As you do not need to move while fighting him, wear a skill ring (Sword Ring, Axe Ring, Club Ring) rather than a Dwarven Ring. If you are drunk after the battle, equip a Dwarven Ring. You should also use Exori and Blood Rage to kill faster. If you are lucky, he will not summon any Green Djinns. Paladins: Run in circles and shoot if he has 2 summoned djinns you may run arround them to avoid get hit by the boss berserk and melee.
Be careful, because he can summon both djinns at the same time, breaking up your shielding and making powerful combos that might kill you in a second.