|Eliwood's days of living in his son's shadow is over. He's finally gotten the reprieve he had long been waiting for.
Yes, Eliwood has a weaker statline than Roy, but he has one thing over Roy, and does it quite well. And that is being able to ploy enemies. That being said, this build is entirely similar to Roy's, but there are a few changes.
The chosen boon is +Spd. The reason why this is chosen over +Atk boon is to help Eliwood double a lot more enemies on player phase. With Fury 3, and Spd Ploy 3 in effect, he has the same effective speed as +Spd -Res Brave Roy with Swift Sparrow 2, the only differences being is better bulk overall (because of being able to utilize Atk Ploy 3 seal) and the ability to help teammates ORKO enemies more. The chosen bane is generally -def, but -hp is also acceptable if you wish to retain his defense. Do note that you may be more susceptible to Panic Ploy should you choose -HP.
Blazing Durandal is the bread and butter of this set, and is the reason why Eliwood's relevancy has been propelled. Reposition is generally a nice assist, and helps his teammates get back to safety.
Passive A is entirely up to personal preference. Fury 3 is more common and is the budget option, granting Eliwood what he needs, with the bonus of helping him proc ploys more often because of the Res boost. Swift Sparrow 2 is generally more expensive but grants more offensive coverage by potentially doubling more enemies, with the bonus of leaving his defenses intact. Life and Death 3 is not recommended on this set, as this reduces his ability to ploy enemies, which is the primary reason you should be using Eliwood over Roy. Desperation 3 helps him get around his weaker defense stat by potentially ORKOing enemies that would normally finish the job on him.
C Passive is Spd Ploy 3, and this is chosen over Def Ploy 3 because speed is generally more important. Doubling enemies is a big deal, and this helps charge your cooldown more because of Blazing Durandal's effects because you get to double more often. Atk Ploy 3 is chosen as his Sacred Seal so that he can trigger Blazing Durandal's effects easier. Eliwood can't really afford to forego one or the other, because this is what he really shines at.
Galeforce is chosen as the special, because this helps Eliwood clean up the battlefield by simply initiating against an enemy that can counter attack him, whether or not he finishes the job.
This is best used under cavalry teams, but unlike before, Eliwood can be a force on his own instead of relying entirely on cavalry buffs to be a threat. He's finally caught the break he's long been asking for.