Hector (LA)

Perfered bane: speed (You aren't fast you'll NEVER double naturally anyways)

If you're willing to do so, feel free to swap sol for Aether (taking away half the enemies defense will help boost the HP gained.

This is a build designed for getting hurt, then ripping your enemy apart with a wrath boosted counter. With both wrath and berserk Armads giving +10 to specials, that's a +20 boost (+10 hp for every wrath boosted sol) so lets say that the enemy cancels your ability to counter, you're down to below 75% hp (~40 hp for a hp booned Hector), you deal an additional 20 damage and get a bonus 10 hp (for your missing 13+ hp). if you added Aether instead of sol this would add to the damage dealt/healed by removing half of your opponent's def effectively healing you for a quarter of their def on top of the usual damage. Panic ploy helps with messing with buffing teams and given this build he'll usually proc it on anyone in range (besides another hp tank like Hector) if and when a Svalinn shield (effective vs armor bonus stopper) comes out as a seal, slap that on hector instead.

TL;DR: This hector gives punishing counters to those who can't finish him off. Get Hit, Hit harder and recover! and if and when a Svalinn shield seal comes out, slap that on hector instead of panic ploy.

Boon/Bane: +Atk/-Spd
Weapon: Berserk Armads
Support: Reciprocal Aid / Pivot / Reposition
Special: Glimmer / Moonbow
Passive A: Fury 3 / Distant Counter
Passive B: Desperation 2 or 3 / Quick Riposte 3 (if using Distant Counter) / Versatile Breaker skill (if using Quick Riposte seal)
Passive C: Armor March 3 / Savage Blow 3 / Versatile
Seal: Brash Assault 3 / Quick Riposte 3
Summoner Support: Depends on how his role fits into the team composition
Ally Support: Someone who can transport him out of harm's way after his attack, preferably a Blue unit that can deal with Reds.

Something that's more of a theorybuild for now. This is my version of LA!Hector who is designed to deal as much damage as possible during the Player Phase. With Berserk Armads' Wrath 3 effect he not only gets almost-free CDR (cooldown reduction) but also gets a whopping +10 damage when he triggers his Special. Unfortunately AND fortunately, it only procs this effect when he's equal to or lower than 3/4 HP. That is what we're going to be exploiting today.
His B and Seal, Desperation and Brash Assault, are here to give him maximum damage output...and while it's better to go with Desperation 3 for most builds, he will only be able to make use of it with Brash Assault which only goes up to 50%, so if you want to save your 4* Shanna from being eaten alive then go right ahead and sacrifice that Mae or Navarre instead and go with Desperation 2. Anyhow, the combination of Desperation and Brash Assault guarantees that any Vantage-less foes will be taking two hacks before being offered a chance at retaliation...and he can do this regardless of his Spd, which is why we went with a Spd bane here. Combine this with his weapon's Wrath 3 effect and a short-charge Special like Glimmer or Moonbow, and you're looking at a dead rat on a taser. However, like Logan Paul's advertisement permissions on YouTube Hector will be disappearing faster than that disgrace's reputation in Japan, so in order to salvage his stats a little bit we're going with Fury 3 — not just to help him get down to the amount he needs to be at, but also to buff his already huge Atk and Def stats.
As an option to help him get down to the HP threshold we need him at, he's also getting Reciprocal Aid (which has the added bonus of potentially fully healing an ally at low HP). We're also going with Armor March 3 (no less) to give him the movement he needs to assist or attack.
For his other options, Distant Counter and Quick Riposte 3 (A and B) are safer options for his Enemy Phase (though Quick Riposte doesn't sync very well with his weapon's Wrath effect) while Savage Blow 3 is useful for inflicting splash damage to make it easier for him to make a consecutive assault (this would be best with a Dance/Sing unit on hand). A Breaker skill like Axebreaker or Lancebreaker is also viable if you're going with Quick Riposte as a seal instead.
His Ally Support needs to be a unit that can support him through his flaws and love him regardless. Being an Armor unit reliant on initiating on low HP means he needs someone to move him away before he gets thrashed by a Red Mage (like Lilina) or any Red unit with Triangle Adept like Roy (who's also his original version's bane of existence). His best bet is a Blue unit that can soak up Res-based damage like LA!Lyn or Fjorm.

Boon: Atk/Def Bane: Spd
Close defense seal chosen to bring Hector's defense and resistance up to 46/30 respectively.

This build makes Hector a nigh unkillable enemy phase unit, who in most cases will kill the unit who initiated combat against him. Assuming the enemy doubles, which is why you take take the speed bane, to try and ensure Hector will he doubled by his opponents. Hector is able to activate aether every enemy phase of combat, provided he is in the vengeful fighter threshold. Also with Hector in the 75-50 percent health range, also gives the benefit of wrath activating when aether activates, giving his special an appreciated 10 extra damage which may come in handy against particularly bulky red units.

If you are ubwilling/unable to sacrifice a winter tharja for this build, the same effect can be achieved by using quick riposte as Hector's B skill, with heavy blade 3 as his seal. Hector's massive attack means that heavy blade will activate against all but the strongest units (This does not take into account buffs like hone armor).
However substituting vengeful fighter for quick riposte/heavy blade is not without drawbacks. For one, vengeful fighter allows Hector to double on enemy phase all the way to 50% health, as opposed to quick riposte's 75%. Vengeful fighter also has a wider window of overlap with Berserk Armads' built in wrath skill, which when activated gives Hector a little more damage and recovered hp on aether's activation. Finally using he deal slot for heavy blade means Hector loses out on the distant defense seal, which brings his defense to a massive unbuffed 46, and his resistance to a very respectable 30. However the quick riposte build has the potential to be almost as potent, it just requires more careful strategy than the vengeful fighter version.

In a world dominated by Quick Riposte and doubles, Hector asks: why double when you can just finish the fight in one fell swoop?

Valentine's Hector hits 58 attack unbuffed with an attack boon, and already has -1 cd and built in Wrath into his weapon. Simply put, this build makes it so that he always has Bonfire ready. With Quickened Pulse, Hector will have Bonfire at 1 cd at the start of the fight, allowing him to safely bait an enemy and hit them with a Bonfire charged strike to take them out. Should he be put in Wrath range, he will also gain an additional 20 damage on his counterattack, and will allow him to start his sweep.

From here, both the built in Wrath of Berserk Armads and Wrath in his B slot will allow him to have Bonfire fully charged at the start of each following turn, and will also provide a total 20 bonus damage alongside Bonfire's 20 bonus damage, allowing him to either initiate with a whopping 40+ damage or bait another enemy for the same effect. This makes him a near unparalleled nuke that is always ready no matter the situation.

His C slot and Support skill are otherwise flexible, though he may opt for Reciprocal aid as another means of activating Wrath.

Gamepress can I volunteer for analysis yet

A pretty simple build. Ignis is to make full use out of Hector's godly defense. Distant Defense is there to reduce damage from magic, specifically red mages. Ward Armor is there to boost allies like the Black Knight, Amelia, Gwendolyn, W!Tharja, etc.