Possible Refining Ideas

Now that we've seen Alfonse's weapon, along with Sharena's, having a major overhaul change after refinement, we can now discuss the possibility for pre-existing weapons in the game.

Eliwood
Durandal
If unit initiates combat, grants Atk+6 during combat.
Ref: Grants Chill Def 3.

This basically turns Eliwood into a melee version of Lilina, with great mobility. Just like Lilina, he can run double Death Blow, while the Chill Def effect helps with his 1HKO potential.

Hector
Armads
Replaces Quick Riposte 2 effect for Vengeful Fighter 3.
Ref: If unit's Def > target's Def and uses a sword, lance, axe or dragonstone, foe cannot make a follow-up attack.

The introduction of Vengeful Fighter definitely outclasses Quick Riposte by a long shot, therefore, Hector will greatly appreciate this change. In addition, he can also run Bold Fighter in the same build, making him the only unit to run both Bold and Vengeful Fighter.

Shiro
Bright Naginata
If foe initiates combat, grants Atk/Spd/Def/Res+4.
Ref: If number of foes (excluding target) > number of allies (excluding unit), accelerate Special per attack. (Highest value only. Does not stack.)

This turns Shiro into that of L!Ephraim and Walhart, but grants him a Breath effect when he is alone. Therefore, he can opt to run Distant Counter and Aether to increase his longevity. His current weapon is much too bare as it is after seeing Nephenee's refinement towards her Dauntless Lance.

Siegbert
Dark Greatsword
If unit initiates combat, grants Atk/Spd/Def/Res+4.
Ref: Same as Shiro's refinement.

Siegbert's refining effect is the same as Shiro's, with the only difference being that his combat buffs only take place during Player Phase instead. This removes the need to run Heavy Blade seal and become mostly independent. In fact, he can run Galeforce along with Quicked Pulse to further his solo killing spree. Like Shiro's weapon, his weapon's effect is much too bare as it is.

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While many of these have powerful effects after refinement, I do think some of them makes sense to me. What are your thoughts on this?