Beasts of the Dark

Overview

 * Difficulty: 6★
 * Reference: Announcement
 * Release Date: 4/12/17,.

Battle Info
ADV=

Beasts of the Dark - ADV
PRO=

Beasts of the Dark - PRO
ELT=

Preemptive attack

 * Increase ATK/MAG/DEF/SPR (50%) for 5 turns to all allies

Normal state

 * Osmose - 30% physical damage as MP drain (50% chance to start in any given round, uses every 3 rounds thereafter)
 * Siren Song - 100% confuse (50% chance to start in any given round, uses every 2 rounds thereafter)
 * 2x water/dark magic to one enemy (30% chance every round)
 * 2x water/dark magic to all enemies (30% chance every round)

Possessed state (After Dark Ifrit dies)

 * First turn: +100% ATK/MAG + 300% Fire Resist + Full heal
 * 30% physical damage as MP drain (100% chance)
 * Raging Hellfire - 4x fire/water/dark magic to one enemy (40% chance every round)
 * Overflowing Hellfire - 4x fire/water/dark magic to all enemies (50% chance every round, only once)

Threshold (70% / 50% / 30% HP)

 * First turn:
 * Self-buff: +50% ATK/MAG, +100% DEF/SPR (dispel this before second turn)
 * Hitting her with water will dispel her
 * Hitting her with fire will dispel her and change her threshold attack (see second turn)
 * Second turn:
 * Ultimate Voice - May do one of the following:
 * 4x water/dark magic AoE with 75% sleep in normal state OR 6x fire/wind magic AoE if hit with fire during first turn
 * 8x fire/water/dark magic AoE with 100% sleep in possessed state OR 6x fire/wind magic AoE if hit with fire during first turn

Preemptive attack

 * Decrease dark resistance (10%) for 5 turns to all enemies

Normal state

 * 2x fire/dark magic AoE (30% chance to start in any given round, uses thereafter every 3 rounds)
 * 2x fire/dark magic S/T (30% chance every round)
 * 1.7x physical attack (30% chance every round)

Possessed state (After Dark Siren dies)

 * First turn: +100% DEF/SPR + 300% Water resist + Full heal + AoE -30% ATK/DEF/MAG/SPR debuff for 3 turns
 * 4.5x fire/water/dark magic AoE (60% chance every round)
 * 5x fire/water/dark magic S/T (50% chance every round)
 * 3x physical attack (50% chance every round)

Threshold (70% / 50% / 30% HP)

 * First turn:
 * Self-buff: + 50% ATK/MAG, +100% DEF/SPR (dispel this then use ATK debuff before second turn)
 * Hitting him with water will dispel his self-buffs, but only once
 * Hitting him with fire will increase his MAG buff to 100%
 * Second turn:
 * Flames of Purgatory: May do one of the following:
 * 3.8x fire/dark magic AoE in normal state
 * 8x fire/water/dark magic AoE in possessed state

Strategy

 * Familiarize with their moveset and read notes above.
 * Keep fire/dark/water resistance up.
 * Keep DEF/SPR buff up.
 * Be sure to equip sleep and confusion immunity to protect from Dark Siren's abilities.
 * Kill them one by one. Don't bother dealing damage to the other one as it'll be healed to full once you kill one.
 * Which one you kill first will change your strategy.
 * Possessed Dark Siren (Dark Ifrit killed first) will deal less damage, but MP drain every turn will be annoying.
 * Possessed Dark Ifrit (Dark Siren killed first) will deal more damage, and your party will be debuffed once.
 * A dual-element attack which includes an element that the Esper resists at 200% will be fully resisted even when the esper has no resistance to the other element (200% and 0% average to 100%).
 * Elemental attacks that deal no damage due to being fully resisted will still satisfy the deal [element] damage missions.
 * Xon's Twist of Fate can be used to steal the +300% resist buffs cast when either Esper enters possessed state..
 * Draining their MP makes the fight easier to complete. Going the kill Ifrit then Siren route, Siren stops using osmose and during the second turn of the threshold she just does a normal attack.

Cheese Strategy

 * Two 850+ ATK Orlandeau can win the ELT fight without any damage taken.
 * Make sure these Orlandeau are equipped with Ifrit esper, Excalibur, and a Bird Killer materia.
 * Bring a dispeller and a DEF breaker, preferably -45% DEF or more. Ling is recommended.
 * First turn:
 * Dispel both espers.
 * Use DEF break on Dark Ifrit or both.
 * Perfectly chained Divine Ruination (27 elemental chain) will kill Dark Ifrit.
 * Second turn:
 * Dispel is not necessary as her buff is only ATK/MAG.
 * Use DEF break if you haven't done so on the first turn.
 * Perfectly chained Divine Ruination (27 elemental chain) will kill Dark Siren.
 * (If you don't kill Dark Siren on the second turn due to ally not having Bird Killer, she will spend her second turn doing her threshold self buff, in which case, simply dispel & break on the third turn and finish her off.)

Setzer Cheese

 * Start with two Edgars that have Chainsaw and are equipped with Coral Sword. Then a Setzer that has Double Dice and must be dual-wielding and is equipped with Coral Sword, Bird Killer (from a weapon/materia), Ifrit for Beast Killer, or three Poach for 1.95x damage to both dark espers.
 * Since this cheese relies on Setzer's Double Dice to proc at its highest fixed damage, it is not guaranteed to work every time. Therefore it can be tedious and nrg-expensive to execute.
 * First Turn:
 * Use Chainsaw for both Edgars to execute a 13 elemental chain.
 * In the chain use Setzer's Double Dice and hit near the beginning of the chain and at the end of the chain.
 * If this does not work reset app and try to use Dice instead. However this will not hit both of the bosses, but will kill one. The next turn gives the player another chance as the remaining dark esper will simply buff themselves when the other dies.
 * A unit that is capable of decreasing lightning resistance or another Setzer may increase the likelihood of the strategy working.
 * If everything goes well an approximate value of (77,777*1.95*2) + (77,777*1.95*4) = 909,990 damage will be dealt, which is 200k over each of their health bars. However, if you decrease lightning by 50%, you will do 1.5x damage, oe 1,364,986. Also with a lightning resistance reduction of 20%, followed by a roll of 55,555 on Double Dice will do over the necessary 700,000 to both (Doubles chances of succeeding).
 * Note: Besides the Trust Moogle, this will complete all other missions.