Shin Megami Tensei: Devil Survivor/Day Six

Boss Battle
This is a very hard fight, if not the hardest fight in the game. Make sure that your two strongest Magic users have ice element skills like Bufudyne and Ice Dance. You should also have enough demons or characters with reviving skills. Long range skills like Evil Wave and Chaos Wave make this fight a lot easier, so equip your main damage dealers with demons that have this skill. Other useful skills are Null-Phys, Null-Fire, Holy Dance, Deathbound and Bind, but they aren’t required for this strategy.

Ignore the other demons and target Belial from the start. Kill the demons in your way until you can attack Belial. Belial attacks three times per turn and uses Maragidyne, Diajama and a powerful normal attack. He also recovers a great amount of HP (200-300) after every round. Use your most useless characters to block the way to the other characters for Belial, so he can’t attack your long ranged magicians. (Alternative: Use Bind on Belial and keep the distance.) Attacking him from the distance does not only prevent Belial from attacking you, but also doesn’t allow him to recover HP.

After losing 50% of his HP, Belial will summon more demons and cast area spells that damage all of your characters and demons (just like Beldr). Be fast and defeat Belial before the other demons can catch up and before you take too much damage from Belial’s attacks.