Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Decarabia · original encounter screenIkusa · original encounter screenDecarabia · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Apis · original encounter screenForneus · original encounter screenIsis · original encounter screen
To get the key, head south-west from the spawn point and take warp point A, then warp point C. Talk to the hollow and tell her you won't hurt her, and she'll give you the key.
Warp point G is locked by default, you have to talk to the mother and son hollow in F22. If you have talked to them the son hollow will appear one tile south of the warp point G, talk to him and he'll unlock the warp point.
Head south-east from the spawn point and take warp point G to get to the boss room.
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Black Ooze · original encounter screenIncubus · original encounter screenBlack Ooze · original encounter screen
Defeat Chagrin to unlock the barrier guarding the key. He's at the dead-end path to the west of the key.
Defeat Ammut in the upper teleport area, to get a key on a later floor.
Talk to Letter Hollow 1 (in the lower teleport area) for a letter, and bring it to Letter Hollow 2 on 25F. You will need to deliver multiple letters between these two Hollows, to get a key for 25F.
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Mitra · original encounter screenShiki-Ouji · original encounter screenBerserker · original encounter screen
Talk to Letter Hollow 1 on 24F for a letter, and bring it to Letter Hollow 2 on 25F (bottom-left of the map). You will need to deliver multiple letters between these two Hollows, until Letter Hollow 2 gives you a key for 25F.
For 25F's second key, take teleporter E to enter the top-left house, then loot the pile of debris in the bottom-right of the house.
Talk to the Hollow couple for a key on a later floor. To find them, take teleporter C to enter the bottom-left house, then talk to them in the middle of the house.
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Grendel · original encounter screenJatayu · original encounter screenGrendel · original encounter screen
Activates the following Chain Effect when a member of your party deals damage with a regular Attack: Inflict Almighty (Mag) damage 4 times on random enemies. Power: 30
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Mermaid · original encounter screenHorus · original encounter screenUnicorn · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Hamsa · original encounter screenPisaca · original encounter screenHamsa · original encounter screen
Berserk Spells: Damage is reduced by 30% if your berserk level in this element is 20 or higher
One of the keys is guarded by Abaddon, the barrier will open up after defeating him
The northwest barrier holds an optional chest containing Mitama extract (NOT a key!). To unlock it, you will need a Mara (the Hollow next to the the barrier mentions how "only Lord Mara can pass here")
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Efreet · original encounter screenHanuman · original encounter screenHel · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Pixie · original encounter screenMara · original encounter screenPixie · original encounter screen
Gains Phys Pierce. Damage dealt through this skill is reduced by 40% if the enemy has Null, Repel or Drain Phys attribute. -50% to Phys attack damage received. Adds Null Curse.
Daisoujou: HP %, life + lead (make sure he goes first, so he can cleanse the party!)
Everyone else: PAtk %, divine. (Try to fit some HP% in there too, to help the team survive long enough to seal the pixies.)
Panels:
Marici: panel 1
Berserk levels:
Phys: 20
Notes:
If you don't have enough speed to go first, close and re-open the game until Kangaroo Boxer's Position Hack lets you go first.
You need to make sure that the revive-sealer scores the killing blow on the Pixies. Use the other damage-dealers to soften the enemy up.
Skull Knight isn't really ideal for the sealer, since Sword of Actuation is Almighty, which cannot be boosted by Berserk levels and is difficult to boost with transfers. This makes it tricky to reach the "sweet spot" amount of HP to let him kill. Someone like Astaroth would likely be easier to use.
The damage-dealers and revive-sealer should either have piercing, or should deal Force damage (the only element that the Pixies don't Null). Something that can crit would be best, so you can get more press turns.
Daisoujou's color isn't really important. Ose Hallel doesn't need to be Red, but if he's Purple then be careful not to kill the Pixies with him.
This team needs to survive long enough to seal both Pixies, but after that, you can let Mara kill them. Since Mara has 50% phys damage reduction, there's not much point to keeping this team alive after the sealing is done.
Alilat ideally should NOT go first (but you can still win if she does). The team is effectively immune to damage/ailments aside from her, so there is a chance she could get charmed. Having her non-first means you can cleanse charm off her before she does something bad.
It is crucial that Alilat stays alive, to maintain Repel Pierce. Her panels decrease her chance of getting charmed (p1) and increase her bulk (p2, p3). Gogmagog's p2 also helps Alilat's bulk, but might not be necessary.
When you need to heal or cleanse Alilat, use an item - Templar Dragon ensures you only use up 1/2 a press turn icon when you do this.
Fog Breath on Yellow Mitra helps to make Mara's attacks less threatening. Alilat with War Cry also reduces Mara's def, to speed up the fight a bit.
The damage dealers should have Ice spells transferred, to exploit Mara's ice weakness.
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Take-Minakata · original encounter screenTake-Minakata · original encounter screenTake-Minakata · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Fomorian · original encounter screenKodama · original encounter screenNaga · original encounter screenSuparna · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Hathor · original encounter screenHigh Pixie · original encounter screenHathor · original encounter screenHigh Pixie · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Ose · original encounter screenOse · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Kamiotoko · original encounter screenOni · original encounter screenOni · original encounter screenKamiotoko · original encounter screen
Combat stats use the screenshot’s level, STR, MAG and VIT with the base stat formulas. Enemy skill bonuses are not included. HP is the recorded maximum.
Sources
Decarabia · original encounter screenShiisaa · original encounter screenShiisaa · original encounter screenDecarabia · original encounter screen
With this Setup you are looking at 23175 BS with Megakin (The main Liberator you want to use in AG because of talking to Rare Encounters such as Mitama).
That means you need either 13% Speed via Brands on Fenrir, 18% Speed on Sleipnir or just one Speed Set of Brands on either of them (as they give 25% Speed Boost)
Purge Extract Ag x3 to trade for a key, so make sure to be on the lookout for them in the Black Market.
King Frost is needed in either your main or your sub-party.
Mara (the Hollow next to the the barrier mentions how "only Lord Mara can pass here")
Kangaroo Boxer
Revive Seal the Pixies, while Daisoujou cleanses ailments.
Daisoujou
Skull Knight
Marici
Ose Hallel
Almighty, which cannot be boosted by Berserk levels and is difficult to boost with transfers. This makes it tricky to reach the "sweet spot" amount of HP to let him kill. Someone like 
Astaroth would likely be easier to use.
Force damage (the only element that the Pixies don't Null). Something that can crit would be best, so you can get more press turns.
Red, but if he's 
Purple then be careful not to kill the Pixies with him.
Templar Dragon
Ice weakness.
Alilat
Gogmagog
Rangda
Mitra
Hua Po
Efreet
Fenrir
Sleipnir
Megakin (The main Liberator you want to use in AG because of talking to Rare Encounters such as Mitama).
Alice
Garuda
Mastema
Black Frost
Cybele is also good in this Floor