Chamber of Arms - Alhena

Overview

 * Unofficial Difficulty: 9★
 * Reference: Announcement
 * Release Date: 5/17/18,.

Check Chamber of Arms for more information regarding the swap battle.

Battle Info
EASY=

The Mage of Sin
HARD=

Phase 1 (100% - 50%)

 * Alhena casts MS It is conjuring powerful magic once every turn, including on a preemptive turn 1 where it does nothing else. AI counts preemptive strike as one turn, while the game turn counter will not.
 * Every 3 turns, starting on turn 3, Alhena casts MS Eye of Light once.
 * During this phase, Alhena will follow 2 different rotations on alternate turns:
 * During even turns: casts MS Blazing Warhead 3 times, MS Carnage Flare once, MS Magic Fists twice.
 * During odd turns: casts MS Torrential Warhead 3 times, MS Tornado Cross once, MS Magic Fists twice.
 * Additionally, Alhena has 2 "soft" HP thresholds:
 * 90%: Casts MS Magnum Opus and ends turn.
 * 70%: Casts MS Magnum Opus + MS Eye of Light and ends turn.

Keep ATK/MAG breaks up at all times and use a strong magic cover tank. Use the first phase as a breathing room to complete the "use 5 limit bursts" achievement and build up your esper if you need it later.

Phase 2 (49% - 0%)

 * Upon crossing the threshold, Alhena casts MS It's melted together with magic power followed by MS Arsmagna and MS The hole in the space is opening. It then ends the turn.
 * Whenever Alhena casts MS The hole in the space is opening, it follows up the next turn with MS Black Hole.
 * It alternates casting MS Flames of Anger and MS Storm of Resentment once every turn and starts casting MS Its resistance to fire and wind have been taken away once every 3 turns.
 * Additionally, Alhena casts MS Luminous Ring once every turn a maximum of 4 times.
 * It no longer casts MS It is conjuring powerful magic, and the MS Blazing Warhead, MS Torrential Warhead, MS Eye of Light rotation ends.
 * During this phase, Alhena also has 2 “soft” HP thresholds:
 * 40%: Casts MS Arsmagna, MS The hole in the space is opening and ends the turn. It then begins casting both MS Flames of Anger and MS Storm of Resentment once every turn.
 * 20%: Casts MS Arsmagna, MS The hole in the space is opening and ends the turn.

Tips

 * See testimonials and discussions.
 * HP hard threshold: 50%. Can't be damaged further until next turn.
 * Ailment Attack: (Phase 1) blind and paralyze, provoke-able, and once every 3 turns. (Phase 2) stop, used every turn, for a maximum of 4 casts. Get your provoke tank to be immune to paralyze. If you are using OTKO strats on phase 2 you may ignore stop, but otherwise bring stop protection or dispel (might require dualcast trick).
 * Ailment Resistance: Can be charmed, but most charm has low proc rate and only 1 turn.
 * Race: Human and reaper. Two races means half potency of killers.
 * Break: Vulnerable to ATK/MAG break. Use 45% or higher.
 * Offense: Magic (AoE), physical (ST), and hybrid (ST). Recommended to have at least a provoke tank and a magic cover tank. Use stats buff and mitigation if you have spare slot.
 * Defense: (Phase 1) 50% magic resistance. (Phase 2) 100% physical resistance. Use a mix party or you may use entirely magic or hybrid party.
 * Elemental Attack: Mostly fire and wind, build up to +200% resistance on your magic cover tank to counter the debuff.
 * Elemental Resistance: It's neutral to all elements. Use anything.
 * MP sustain: If you are using OTKO strats on phase 2 there is nothing to worry, otherwise he will use a massive MP drain to your party for 3 separate thresholds below 50%. Instant MP recovery instead of refresh is recommended.
 * Onion Knight splendor attacks (+70% fire/wind resistance) can help during phase 1.
 * Suggested roles:
 * Healer/Summoner
 * Magic attacker
 * Magic cover tank
 * Physical attacker
 * Physical provoke tank
 * Hybrid attacker
 * ATK/MAG breaker
 * Stats/resistance/mitigation buffer
 * Don't exchange your physical team for your magical team until after the AoE MP drain at the 50% threshold.
 * It's recommended to one turn kill the second phase, avoiding all threshold and annoyance. Bahamut alone, with 100% EVO MAG evoker finishing a chain will deal 35-42% damage.