Brave Lucina

Standard Buff build for infantry team giving +6/+6 in radius.
Summoner support on her with Renewal and lance defense.
1 Drawback goes well with ranged reposition and dancer.

Lucina makes a great support alongside a unit like Marth to massively buff offense stats in combat. Chill Spd 3 cripples the fastest foe(s) speed stat by -7, allowing her team to follow up against that said unit. Chill Def 3 is probably a better choice however as units who enjoy a massive amounts of fire power are poison dagger heroes, brave blow (brave+death blow) or quad strikers.

Primarily support; Geirskogul grants atk/spd +3 to physical combat units within 2 spaces while Spur Atk adds +8, giving atk/spd +11/+3 to adjacent units.

My Solution for my Ike's Spd Problem
Sadly also suffering from spd aswell ;-;

Swap-able Skills
Special: Aether/Bonfire
A: Fortress Def
B: Renewal/LanceBreaker

The Attack Buffer of Team "Ike's Bizarre Adventure"
(L!Ike/Hector/Delthea/Lancina)
Ally Support with Ike

Buffs the team using her Prf wep and Drive Spd and a healer of some sort(I just need to raise her HP even further.) HB 3 Seal is usually used by someone else when she's, so she can't use it to proc Aether faster. I did give her Bonfire for a faster special when not on TT or Chain Challenge. I tried to make her a weaker version of Lukas, giving her Fortress 3 to tank most melee units like our Ginger Stud himself.

Preferred IV spread: +Atk or +Spd / -Res

This set emphasizes Brave Lucina's amazing non-limited buff abilities, mainly focusing on the speed stat department.

The main focus is Lucina's buff potential. Through her personal weapon, Geirskogul, she can raise the attack and speed stat by 3 during combat to allies using swords, lances, axes, bows, or daggers and are within 2 spaces. In other words, she has offers a drive-wise buff of both attack and speed to all allies who deal damage based on defense.

This factor, along Drive Spd, adds up to +3 attack / +6 speed potential to allies within 2 spaces, which is ultimately relatively high offensive gain, especially when considering that these buffs are not limited to units of a certain movement type. As an added bonus, both the prf and Drive Spd are available on Lucina by default.

While these two factors alone make Lucina a great supportive unit, she can be enhanced and specialized even further through the utilization of Chill Spd. While she offers +6 speed to allies, she inflicts -7 speed on the unit on the opposing team with the highest speed stat. She alone can produce an absolute speed difference of 13 from the starting value, while keeping safe distance; the +6 from drives take effect within 2 spaces and the -7 from Chill Spd take effect throughout the entire map.

A speed difference of 13 means that an opposing unit with originally 17 more speed cannot double anymore, and an opposing unit with originally 8 more speed being doubled by an ally under the effect of Lucina's buffs.

While Chill Spd can be utilized on other units as well, it can end up as a waste of a B slot, which is many times a crucial skill slot. Since Lucina already specializes towards buffs on allies, taking on the role as a debuff unit complements well for the maximum possible speed difference between an ally and its opposing unit.

From here on, the decision has to be made whether to focus Lucina entirely into support, or use her as a combat unit as well. Even though three slots focus mainly on support, she can still present herself as an enormous threat to the opposing team, mainly due to her splendid attack, speed and defense spread.

Should one focus her into checking specific units in combat as well, the use of Reposition comes in handy. On the supportive side, either Reciprocal Aid or any rally can be used, preferably a double-skill rally. Rally Atk/Spd can be used to further buff the offensive capabilities of allies, as the rally buffs do stack with the drive buffs.

Aether and Steady Breath, alongside the relatively impressive defense stat, can form a great combination of tanking, delivering a heavy blow upon the special activation, and surviving through the healing factor of Aether. Combined with Quick Riposte as a seal, Lucina can work wonders if utilized as an EP-oriented combat unit. At such time, a boon in attack is preferred, as she will mainly not get doubled due to her spread and the use of Chill Spd, while she will double through the use of QR as a seal.

Should one desire to not focus her into EP entirely, but make her a mixed phase combat unit, a boon in speed might be preferred due to the effect of QR not being present. On the other hand, should it be desired to make Lucina a pure support unit, the Spur Spd seal can be used to push the absolute speed difference from 13 to 17, cutting off even the most enormous speed gaps between units.

Another viable seal to use on a support-focused Lucina is Drive Def, which ultimately results in +3 atk / +6 spd / +3 def buffs during combat, all while being able to stay 2 spaces away, which presents itself not only as a potentially safer option, but also as an action that is easier to execute during battle.