This boss is zero threat to sorcerers. The above strategies make it FAR too complicated. Do this: equip Perseverance, two Lingering Flame, Fire Orb, and any Soul Arrow beyond basic. Cast Perseverance, then enter the fog. Cast 2 Lingering Flame, stand behind them, then aggro the small rats. They’ll approach and detonate the Flames, and can’t touch you because of Perseverance. Then, when the big one jumps down, dodge his attack and get far enough away to cast Lingering again. He’ll chase you and detonate it, and it’ll take off about 1/6 of his life. Keep casting Lingering Flame and lure him into it and he’ll wind up killing himself. He shouldn’t even touch you. If you run out of Lingering Flame then lon some Fire Orbs at him. He’ll be dead before Perseverance wears off.