JP Boss Guide by /u/Zurai001

Multiplayer Enemy AI by /u/TFMurphy

BOSS: Archaeoaevis (V)

Difficulties: 160 (Ultimate ) and 220 (Apocalypse )

Mastery Conditions:

• Defeat the Archaeoaevis with at least 4 members alive at the end of the battle.
• Reduce the Archaeoaevis' ATK.
• Reduce the Archaeoaevis' MAG.

Overview:

• Elemental weakness changes based on phase (total of 5 phases):
  • Archie's first phase resists fire, ice, and thunder, nulls earth, and takes 120% damage from wind.
  • Archie's second phase resists thunder, nulls earth, absorbs ice, takes 150% damage from fire, and takes 120% damage from wind.
  • Archie's third phase resists ice, nulls earth, absorbs fire, takes 150% damage from thunder, and takes 120% damage from wind.
  • Archie's fourth phase resists fire, nulls earth, absorbs thunder, takes 150% damage from ice, and takes 120% damage from wind.
  • Archie's Resurrected form nulls fire, ice, thunder, earth, and wind.
  • He also resists Water, Holy, Dark and Bio throughout the fight.
• Uses a myriad of elemental attacks (Ultimate Blaze deals Ice-elemental damage despite its name, also has Ultimate Lightning).
• A lot of HP% based damage and attacks that deal Sap. Also counters any attacks with Counter Sap.
• In his final phase (Resurrected Form) he has a nasty Ultimate Blaze (supermassive magical Ice damage high chance for party Sap) into Ultimate Maelstrom (HP = 1) combo.

Tips:

• Due to his changing elemental profile, it might be preferable to just NE it instead. Wind damage works for the first 4 phases.
• Affliction Break comes recommended to help protect against some of the statuses he can deal (Confuse, Sap, Paralyze, Blind), as is Ultra Cure and Astra.
• The hardest part about the Ultimate Blaze > Maelstrom combo is if your party is Sapped and you have Guts, due to how multiplayer ATB works, your whole party will take damage from Sap, which then triggers Guts, then Sap triggers again, as you slowly watch all 8 people die like flies. I didn't beat this fight in JP when it came out, but my belief is you need to have some form of AoE Regen (Memento of Healing, Kirin, SB with High Regen) before you see Maelstrom. Always try to keep Regen up if you can.