Halloween Tiki

Weapon: Frostfire Breath

Assist: Positional Assist / Flexible

Special: Glimmer / Moonbow / Draconic Aura

Passive A: Atk/Spd Solo / Atk/Spd Push / Sturdy Impact 

Passive B: Dive-Bomb / Desperation / Aerobatics / Chill Spd / Chill Res

Passive C: With Everyone! / Atk/Res Rein / Res Smoke / Spd Smoke / Flexible

Sacred Seal: Heavy Blade / Swift Sparrow / Death Blow / Darting Blow 

• Frostfire Breath’s immense damage focus coupled with their flexible mobility as a flier and stellar offensive stats makes it abundantly clear that Tiki and Ninian were meant to be an offensively-tuned hero, thus rendering a build centered around this quality an obvious (and effective) course of action. The choice of IVs here is mainly between +ATK and +SPD -- the former is better for stronger raw damage, while the latter is useful to round out the duo’s offenses and assist their performance against foes they can’t outright KO.
• Glimmer scales well with Frostfire Breath’s built-in Blade tome effect and comes with a short cooldown for frequent activations; however, for security against bulkier foes, Moonbow (which shares an equally low cooldown) should be taken instead. At the cost of impeding the rate of Tiki and Ninian’s Special activations, Draconic Aura may be an option to consider for a more consistent damage ceiling. 
• Nearly any A slot skill that serves to augment Tiki and Ninian’s offensive stats makes for a natural complement to their intended playstyle here -- and fortunately enough, their base kit includes one of their best options right from the start. That being said, if aiming to use Dive-Bomb (which requires the two remain at high HP), Atk/Spd Push can be swapped out in favor of Atk/Spd Solo for its lack of recoil damage. Despite not doing anything to boost their Speed, Sturdy Impact remains a potential alternative as well to make initiating combat much safer. 
• Although their B slot options are restricted substantially due to their flying status, Tiki and Ninian still have a few good skills to consider. Most notably, Dive-Bomb shines for its ability to grant a pseudo-Brave effect by granting Desperation, but without requiring any setup other than simply initiating combat -- it does, however, necessitate that both they and their opponent be above 80% HP, which discourages using skills like their native Atk/Spd Push. Combined with Frostfire Breath, this lets them kill virtually anything they can double. 
  • That being said, Dive-Bomb remains an incredibly elusive and high-investment skill so if it’s understandably unavailable, Desperation (which does pair nicely with Atk/Spd Push) or their native Aerobatics will work fine. Although not terribly consistent since they can’t be targeted, Chill Spd or Chill Res are some other possible alternatives. 
• With Everyone! can be kept in the C slot if one favors its self-sufficient nature and appreciable amount of support, immediately enabling Frostfire Breath’s effect when active. However, if Tiki and Ninian can acquire their required Def/Res buffs from allies, Atk/Res Rein or Smoke skills if refresher support is available make for terrific replacements. 
• Tiki and Ninian can leverage the Heavy Blade Sacred Seal to an incredibly potent extent for rapidfire Special activations but given that this is a highly coveted seal, anything that further augments at least one of their offensive stats will also work.

Weapon: Frostfire Breath

Assist: Positional Assist / Flexible

Special: Miracle / Glimmer / Moonbow

Passive A: Distant Counter 

Passive B: Vantage

Passive C: Pulse Smoke / With Everyone! / Res Smoke / Atk/Res Rein / Flexible

Sacred Seal: Heavy Blade / Iote’s Shield / Fierce Stance / Atk/Def Solo 

• Thanks to Frostfire Breath’s multiple sources of providing increased raw damage (most notably its Blade tome-esque effect), Halloween Tiki and Ninian constitute an excellent candidate for a standard Aether Raids Vantage nuke build; a +ATK IV is ideal given the OHKO-oriented nature of its playstyle. 
• The general gameplan of this set is relatively simple: buff their defensive stats as much as possible, ideally eliminate a problematic frontliner during the initial Player Phase (which also allows her to apply Smoke skills if equipped with one), and soak enough damage to enter Vantage range for subsequent sweeping, though this can possibly be done safely through enemy Bolt Towers or traps. Although Tiki and Ninian’s firepower should typically be enough to OHKO most foes short of the bulkiest of greens, this set isn’t foolproof and one should be cautious of threats like sources of Panic or buff neutralization, Hardy Bearing users, and Firesweep/Dazzling Staff units.
• Beyond Vantage, equipping Distant Counter in the A slot is crucial to ensure that Tiki and Ninian won’t be wrecked by ranged units and maximize their overall coverage. If unavailable, Distant Ward and Distant Foil are (albeit extremely niche) alternatives one can consider, or just their base Atk/Spd Push can be kept at the cost of their versatility. 
• The pair have a few different options for their Special depending on personal preference. In particular, Miracle is a standout choice meant to grant her a degree of safety and method of playing around counterstrategies to this build’s playstyle -- it’s important to keep in mind that even with Vantage, taking damage is not always avoidable. For more of a damage focus, short cooldown Specials like Glimmer or Moonbow are ideal.
• While Tiki and Ninian’s exclusive With Everyone! is an excellent choice to enable Frostfire Breath by themselves, providing them defensive buffs with outside support does open up their C slot for other much more potent options. Smoke skills are notable to further enhance their performance through debuffs, with Pulse Smoke being particularly lucrative in Aether Raids Offense for its ability to shut down Infantry Pulse teams. Atk/Res Rein is another potential choice to boost damage and Heavy Blade consistency.
• Among their various options, Iote’s Shield is an excellent Sacred Seal candidate to remove Tiki and Ninian’s weakness to archers, who may otherwise pose too much of a risk to safely carry out this build’s gameplan -- or if using Miracle, Heavy Blade is recommended to let them access it faster. If unavailable, seals that increase their Attack and other key stats such as Fierce Stance and Atk/Def Solo will work perfectly fine here.