Nils

Weapon: Frost Breath

Assist: Play

Special: Moonbow / Iceberg / Luna

Passive A: HP/Spd 2 / B Duel Infantry / Fury / HP Def 2

Passive B: Even Pulse Tie / Sudden Panic / Wings of Mercy

Passive C: Infantry Pulse / Panic Ploy / Infantry Rush / Infantry Breath / Flexible

Sacred Seal: Drive Atk / Tactic Skills / HP/Spd 2 / HP +5

• Nils shines as a supportive ally, and this build focuses on maximizing his effectiveness in such a role. A +SPD IV helps boost his defensive Speed for improved survival, though a +HP IV may be preferred to leverage skills like Infantry Pulse with greater ease. 

• His choice of Special is largely inconsequential here as his combat prowess is a secondary concern, but Moonbow remains a good choice nonetheless for its short cooldown. For greater burst, Iceberg and Luna should be considered instead. 

• If using HP-scaling skills like Even Pulse Tie and Infantry Pulse, A slots that increase Nils’ HP are ideal; B Duel Infantry is particularly attractive if aiming to maximize his scoring potential in Colosseum modes. Otherwise, Fury is a good generalist option that helps in a pinch. 

• His B and C slots are both flexible and can be filled by anything that complements his team composition; those that scale off of his high HP pool for a refresher or that take advantage of his infantry status (e.g. Infantry Rush and Infantry Breath) are especially standout. Note that stat debuffs are redundant on Nils due to Frost Breath. 

• Aside from seals that increase his HP, Drive and Tactic seals are also recommended to provide his allies with additional support on top of his refreshing and debuffing. 

Weapon: Frost Breath

Assist: Play

Special: Moonbow / Luna / Iceberg

Passive A: Swift Sparrow / Atk/Spd Solo / Fury 

Passive B: Desperation / Wings of Mercy / Even Pulse Tie

Passive C: Infantry Pulse / Odd Atk Wave / Flexible

Sacred Seal: Swift Sparrow / Sturdy Blow / Darting Blow 

• Thanks to his surprisingly solid offensive statline (for a refresher), Nils can perform adequately when built with a focus on enhancing his combat prowess. An Asset to either one of his offensive stats is accordingly ideal here. 

• Moonbow is a good Special option for its frequent activation rather, but Luna or Iceberg are also potential choices for greater burst damage in exchange for their longer cooldowns. 

• Any standard offensive A slot skills will work here (such as Swift Sparrow, Atk/Spd Solo, and Fury) to boost Nils’ damage output. His B slot should similarly share an offensive focus (with Desperation and Null Follow-Up both being strong candidates), but can be occupied by something like his native Even Pulse Tie to retain more of his support. 

• Seals that supplement Nils’ key offensive stats like Swift Sparrow, Sturdy Blow, and Darting Blow are highly recommended here.