Luthier

Weapon: Plegian Torch(+Spd) / Gronnfox(+Spd)

Assist: Positional Assist

Special: Luna / Blazing Special

Passive A: Swift Sparrow 2 or 3 / Atk/Spd Push 4 / Life and Death 4

Passive B: Null Follow-Up / Special Spiral / Desperation

Passive C: Joint Drive Atk / Preference

Sacred Seal: Atk/Spd Solo / Blade Session / Swift Sparrow

• Luthier joins Fire Emblem Heroes as a generic green tome user. Despite his lack of an exclusive weapon though, Luthier’s decent statline allows him to function quite well as a player phase unit.
• While Green tomes have less good options in terms of inheritable weaponry, the Plegian Torch is an excellent option that allows pretty much any Green tome user to inflict a massive stat penalty against debuffed foes, although this requires team support to pull off consistently. Luthier’s innate Gronnfox is also a good option on a budget as the Plegian Torch is difficult to obtain as a seasonal locked weapon.
• Life and Death 4 is Luthier’s preferred A slot if one wishes to make use of Special Spiral and an Aoe special, as Aoe specials scale off the user’s visible Attack. Otherwise standard player phase A slot skills such as Swift Sparrow and Atk/Spd Push 4 all work well thanks to the massive boost they give to Luthier’s offense.
• Null Follow-Up is invaluable due to how many exclusive weapons have follow-up negation of automatic follow-ups(and in some cases both), and Luthier can make excellent use of it to ensure his follow-up attacks cannot be negated. Desperation is a fine substitute on a budget as well, as it allows Luthier to circumvent his weak defensive stats to some extent by allowing him to attack twice before the foe can counter, provided he’s reached its health threshold.
• Player Phase sacred seals such as Atk/Spd Solo and Blade Session round out Luthier’s kit nicely, giving him another bonus to his offensive stats.

Weapon: Plegian Torch(+Res)

Assist: Positional Assist

Special: Noontime / Luna

Passive A: Close Foil / Atk/Res Unity / Mirror Stance 3

Passive B: Null Follow-Up / Null C-Disrupt

Passive C: Pulse Smoke / Preference

Sacred Seal: Mirror Stance / Close Def / Distant Def / Mystic Boost

• Luthier can function reasonably well as an AR O superunit, thanks mostly to the Plegian Torch thanks to the massive potential stat swing it provides, and it can easily be setup via Temari users such as Eir or Tethys.
• Close Foil allows Luther to counterattack close range foes(excluding dragons) and grants him a boost to Attack and Defense during enemy phase combat against physical foes. If one wishes to stick to ranged tanking, Luthier can instead opt for Atk/Res Unity, which can convert debuffs to buffs and gives a nice bonus to Attack and Resistance to boot, at the cost of requiring an ally within 2 spaces. Lastly, Mirror Stance 3 can be used if one desires the Guard effect, although it tends to be less useful than Atk/Res Unity in most cases(albeit much easier to attain).
• Null Follow-Up allows Luthier to negate the bevy of exclusive weapons with inbuilt automatic follow-up attacks and follow-up negation, while Null C-Disrupt allows Luthier to negate Firesweep weapons and Dazzling Staff. Null Follow-up tends to be more useful(IS can’t stop making units with automatic follow-up prfs for some reason) but Null C-Disrupt remains a decent choice depending on what your team struggles with.
• Pulse Smoke gives Luthier a means of slowing down enemy specials, which is incredibly useful against AR-D teams that rely on precharged specials.
• Defensive sacred seals such as Mirror Stance, Close Def, and Distant Def are all fine options to augment Luthier’s enemy phase. The Mystic Boost sacred seal can also be used to give Luthier a source of passive healing while negating Wrathful Staff and Adaptive damage(although in AR-D teams staff users usually don’t care about their damage output). Mystic Boost’s passive healing also allows Luthier to opt for a damage special instead of Noontime.