Return of Nero Fest 2018: Act VI - The Oldest Hero

Enemy Skills: Gilgamesh immediately reduces your entire team’s NP gauge to 0% upon reaching the 3rd wave, including the backline. Support Noble Phantasms like Lord Camelot should be used right before the third wave, while NP charge skills should be conserved until the third wave.

Upon entering the third wave, Gilgamesh applies a harsh (presumably 50%) 10-turn debuff to Noble Phantasm damage that can’t be removed . It is also applied to the backline, and will not be reapplied after it expires. This skill renders most NP rush strategies ineffective.

During the battle, Gilgamesh can cast Charisma or Golden Rule randomly. Beware of a sudden Enuma Elish.

Gilgamesh has a high passive Crit Rate, and additional (unlisted) Magic Resistance. Annoyingly, he can actually resist Gandr and not be stunned by the Chaldea Combat Uniform.

Enemy AI: Removing Gilgamesh’s buffs will result in him re-applying his continual attack buff and immediately using Ea. Since he will cast this skill first, using buff removal when his NP gauge is already full will not result in a second Ea. Occasionally resetting his stack of attack buffs is highly recommended.

Team Comp: Single Target Lancers are the ideal choice for damage, especially since Gilgamesh will shred through most Berserkers.

High Critical Damage is recommended to circumvent the NP damage debuff. Alternatively, you can use Servants with high Noble Phantasm damage to blow through the NP damage debuff anyway, or survive long enough to outlast the Noble Phantasm debuff and then delete him.

Stalling Gilgamesh: Stalling Gilgamesh while the Noble Phantasm debuff is active, is a valid strategy. Having Servants with Buff Removal, AOE Dodge / Invulnerability, taunts, NP Gauge Drain, stuns/charms, and/or Critical Rate Down debuffs are key to survival. Guts may work as well. Do note that Gilgamesh's Magic Resistance makes debuffs somewhat unreliable.

Mystic Code Options: are mostly flexible. Anniversary Blonde can aid in Critical damage output with its huge star button and powerful Buster buff, while the Chaldea Combat Uniform can be used to sub in skill-users like Waver/David as well as (hopefully) stun Gilgamesh for an extra turn.

CE Recommendations: An MLB Divine Three-Legged Race CE is the best bet to rush down Gilgamesh in terms of raw damage. CEs that provide stars like Fragments of 2030, or Golden Catches a Carp, are pretty decent to provide additional stars. For backline supports, Evasion/Invincibility CEs like Volumen Hydragyrum or Melty Sweetheart are excellent for survival, with guts CEs tentatively recommended for unreliable survival. Taunt CE's like Guda Guda Poster Girl are also good for directing damage towards servants with good survivability.

Tips and Tactics: Since Gilgamesh's attack buffs will outscale most defense buffs, try to abuse Evasion/Invincibility as much as possible. Do try to use them after the first turn or two when Gilgamesh's basic attacks start to really hurt.

All of Gilgamesh’s cards have 5 hits, meaning he will charge a minimum of 15% NP gauge to his target per card, and up to 90%(!) NP gauge if he focuses an Avenger like Jeanne D’Arc (Alter) or Edmond Dantes for a turn. Surviving such an onslaught would be difficult, but Avengers and Berserkers benefit a lot from Gilgamesh’s hit counts.