Halloween Hector

Weapon: Conjurer Curios (+Eff) / Arcane Éljúðnir (+DEF)

Assist: Positional Assist

Special: Escutcheon / Bonfire

A Passive: Close Def / Sturdy Stance / Svalinn Shield

B Passive: Hardy Fighter / Crafty Fighter

C Passive: Near Save

Sacred Seal: Steady Breath / Atk Def Form / Quick Riposte

• As an armored unit, Halloween Hector always has the option of running the Savior skills. As damage reduction piercing is relatively uncommon in the melee matchups and Conjurer Curios provides some form of damage reduction, this is likely Halloween Hector’s best role in Aether Raids Offense.
• The focus of the build is to potentially most melee matchups that are frequently seen in Aether Raids Defense, such as Brave Seliph as of the time of writing. Close Def 4 is particularly useful against visible buffs, which is turned on by default on Brave Seliph’s personal skill Heir to Light. Hardy Fighter also provides the insurance needed to further reduce the amount of damage taken by the opponent. Other alternatives include Sturdy Stance (for Guard effects) or Svalinn Shield should armor-effective weapons become more common.
• Outside of the A Passive, the rest of the builds are meant to provide Hector with more durability; Escutcheon, Hardy Fighter, and Steady Breath provide additional damage reduction on both the first attack and follow-up if the focus is survivability, while Bonfire and Crafty Fighter is used for a more offensive edge. The seal would follow suit depending on the priorities as well.
• Should a player prefer not to be fully dictated by the turn count condition of the weapon, switching out his personal weapon for the Arcane weapon is not a terrible idea. The cooldowns of the special skills would need to be adjusted (Pavise over Escutcheon, Ignis over Bonfire) to take into account the additional cooldown reduction of the weapon. 

Weapon: Arcane Éljúðnir (+DEF) /  Conjurer Curios (+Eff)

Assist: Positional Assist

Special: Aegis

A Passive: Svalinn Shield

B Passive: Hardy Fighter

C Passive: Far Save

Sacred Seal: Deflect Magic 

• In Summoner Duels, Halloween can serve as a double-purposed Save unit on top of having a Duo button. The Duo button can be relatively useful in some situations where the map is vertical, and allow the nukes to potentially secure key takedowns against the foe.
• The rest of the build is focused to ensure that Hector can at least take a single engagement from the foe; Svalinn helps against Armor effective weapons such as Valentine’s Chrom, Deflect Magic is useful against any magic foes that can follow up as Hector does not counterattack, and Hardy Fighter ensures that any instant specials outside of Area-of-Effect specials are neutralized.
• For this build and application, the utility of his main weapon is rather limited, as the turn count condition meant that half of its effects are switched off half the time unless the foe is chipped down, which can be rather unreliable in some maps without a Duo skill or any other source of damage. The Arcane weapon is likely to be a better choice, while his personal weapon is likely a budget option