Hall of Sin

Hall of Sin is the second map of the Alternate Netherworld bonus stage in Disgaea: Hour of Darkness.

Strategy
The Djinns have a lot of HP and their high attack power combined with the ability to counter, could make this a difficult fight. Fortunately, the enemies are nicely spread out and the distance between them makes it unlikely that they will overrun you.

Use the stage layout to your advantage. Place a high defense character in one of the small corridors and lure out the enemy. Keep your tank healed while using long range skills with other characters to kill them one by one. Watch out for the 'Golem Cannon' skill, which hits 3 spaces in front of the Golem.