Chapter 7, Mission 6
Enemy Hero: Efreet Lord*
Enemy Level: 500
Energy Cost: 100
- 0% Mastery: 800 Exp, 8,000 Gold
- 100% Mastery: 960 Exp, 9,600 Gold
- 200% Mastery: 1,120 Exp, 11,200 Gold
- 300% Mastery: 1,280 Exp, 12,800 Gold
Strategy: Pegasus Knights should take out his Goblins, his Lava Golems, and ultimately, him. He has no serious counter against them. Cursed Pirates also work in the same way. Best is to summon first one squad of Pirates and afterwards only Pegasus Knights till he's down - the Pegasus Knights deal the damage, while the Pirates build up your defence if he eventually summon Succubi (Succubi, having Fire Golems in front of them, are the worst thing, if you use only Pegasus Knights).
For those with lower stats, dragon warriors can help hold off the boss until a sufficiently large group of pirates have been massed up.
Also, you can use Gorillas and Witches, it will take longer but works too (I beat this quest using that strategy at level 246).
(*) Unique Hero:
As Flame Devil except:
Special Attack, Fire Volcanoz III
(**) Unit Units:
Twin Salamander (Ex)
As Twin Salamander, except: Cost: 4, 200 / 80 / 60.
Element: True Earth, Melee
Population: 4, Cost: 3
Shadow Goblin (Ex)
As Goblin except:
Divine Angel (Ex)
As Angel Knight except:
Element: True Thunder, Melee, Weak versus Earth.