Attack of Gilgamesh

Abilities

 * Up to 8 actions per turn.
 * HP threshold: 80%, 50%, 30%.
 * Will use Gilgamesh Transform and Bushido - Freedom every threshold.

Strategy

 * The fight can be simplified into 2 things:
 * Managing his HP threshold.
 * Disabling his elemental abilities.

HP Threshold and Others

 * Gilgamesh will use only 2 abilities on each threshold (80%, 50%, 30% HP):
 * Gilgamesh Transform: DEF/SPR buff
 * Bushido - Freedom: AoE Damage, ST Death, AoE Dispel
 * If you are lacking healing power, make sure to MAG break and guard before each threshold. Having DEF/SPR buffs up and summoning Golem can help mitigate some of the threshold damage.
 * On the turn you are planning to push below the threshold, there is no need to disable any element, since he will only use his threshold abilities and nothing else on that turn.
 * Take care of buffs, dispel, and raise dead party members after each threshold.
 * Many of his attacks are single target, which can be easily tanked with Provoke or Draw Attacks. This will also work against his single target Death effect from threshold.
 * Elemental damage, including earth percentage damage, can be resisted with elemental resistance.

Elemental Abilities

 * Elemental abilities can be disabled by attacking Gilgamesh with that same element.
 * Abilities will be disabled for that turn only. You have to repeat every turn.
 * Before 80% threshold, Gilgamesh can only use one elemental attack, Excalipher. You may skip disabling Excalipher before 80% threshold as it's not threatening.
 * Start disabling his abilities after 80% threshold.
 * Gilgamesh will gain a lightning ability after 50% threshold, and it can only be disabled with magic or hybrid damage . You can purchase Thunder Blade from Magi Nation Mysidia to deal hybrid damage.
 * You can also combine a lightning weapon with any hybrid ability to disable his lightning (Note: Hybrid damage and physical elemental damage are different).
 * Osmose Blade is considered hybrid damage, and it has the added benefit of helping to reduce item consumption or complete the no item mission.
 * An ally can disable more than 1 element by using different elemental ability and weapons. If you're missing weapons or lack innate abilities remember that Espers can have them as well. Otherwise bring crafted abilities (e.g. Stone Blade, Water Blade).
 * Rain with dual wield Rune Blade (Light) and Air Knife (Wind) using Lava Floor (Fire/Earth) can disable 4 elements at once.
 * If you can't cover all elements, try disabling most threatening ones.
 * Disable priority:
 * Lightning (after 50% threshold): AoE Damage, DEF/SPR debuff, and paralyze. Highest priority.
 * Fire: Damage, ATK/DEF debuff, and MP absorb. Highest priority.
 * Light (after 80% threshold): Damage, confuse. High priority.
 * Wind: Damage, paralyze, and resistance debuff. High priority.
 * Water: Damage, MAG/SPR debuff. Low priority.
 * Earth: % Damage. Low priority.
 * If you get hit by Gilgamesh's lightning attack, wait until it wears of or dispel it before breaking the final threshold, otherwise you will not survive it.

Water Break

 * After receiving water damage the third time, Gilgamesh will use Break on that following turn.
 * Water attacks don't have to be used on consecutive turns.
 * Gilgamesh will only use Break once throughout the entire battle (e.g. it will not trigger on the 6th/9th/etc. water attack)
 * This can be beneficial if you bring Dispel since it gives you a breathing room for a turn.
 * If you attempt to get him below threshold and break him on the same turn, he'll use Break instead, with threshold abilities delayed to the next turn.

Setzer Cheese

 * Required units/Espers: Setzer,two or more chainers (Edgar), and someone with an elemental break. Need Diablos with Man-Eater.
 * Setzer setup: (Dual Man-Eater)
 * RHand: Any elemental weapon that both of the chainers can also equip. (Coral Sword Recommended)
 * Lhand: any non elemental weapon
 * Ability 1: Man-Eater
 * Ability 2: Dual Wield
 * Not necessary if dual wield is granted elsewhere.
 * Elemental Break must be at least -10% (Imperil or Coral Sword, both recommended)
 * Chainers:
 * Must have matching elemental weapon to Setzer
 * Setzer Set-up (Single Man-Eater)
 * RHand:Any elemental weapon that both of the chainers can also equip.
 * Lhand: any non elemental weapon
 * Ability 1: Dual Wield
 * Elemental Break must be equal to -50% and match the element used.
 * The strategy
 * Using Setzer's moves double dice/dice and getting 77,777 damage is the only way to accomplish this. The 77,777 damage will be multiplied by either 2.2 (Double Man-Eater strat), or 2.25 (Single Man-Eater) normally. However with the addition of the two chainers who have the same elemental weapon the multiple is increased to around 2* and then 4* damage. Use the two chainers and then use Setzer's double dice/dice as they chain (don't waste time the move is quick) to hit in the chain twice.
 * Math Dual Man-Eater ((77,777*2.2*2)+(77,777*2.2*4))=1,026,656 damage
 * Math Single Man-Eater ((77,777*2.25*2)+(77,777*2.25*4))=1,049,989 damage

Evade Cheese

 * All of Gilgamesh's attacks, except for Excalipher and Excalibur, can be evaded. However, secondary effects like Death or Paralyze can be applied even if the attack misses. Still, with the right gear, a single unit can be used to defeat Gilgamesh with auto attacks.
 * Unit Requirements:
 * 100% Evade
 * Evades the damage from Gilgamesh's attacks, except for his Light element attacks.
 * Weapon w/ Light Element
 * Seals the Light element, preventing Gilgamesh from using Excalipher and Excalibur.
 * Neither of these attacks can be evaded. Excalibur also inflicts Confusion.
 * Resist Death (Null)
 * Nullifies the Death effect from Bushido - Freedom.
 * Safety Bit or Genji Shield can provide this.
 * Resist Paralyze (Null)
 * Nullifies the Paralyze effect from Electrocute and Whirlwind Blade.
 * Paralyze will cancel the Evade effect and allow all of Gilgamesh's abilities to deal damage.
 * This is available from several sources, but Assassin's Vest provides it along with 10% Evade.
 * This strategy can be used to complete all of the Missions.
 * The Trust Moogle mission requires getting the last hit with a limit burst, which can be tricky to time with just one unit.
 * If you can't meet the other requirements, you can still benefit by having a perfect dodge unit, usually Noctis/Ling, using Fish/Provoke to evade most of his attacks.
 * Raise them if they are KO'd by death.
 * You can also use two perfect dodge units and raise the other unit when they have died, but the effort required would be even greater than doing this fight normally.

Setup
Note: List was last updated on August 21st 2017. Elemental Weapons=

Elemental Weapons
Notable Units=