I have a (+Def, -HP) W. Lissa and a (-HP, +Res) Hector. It seems like Lissa might be a better DC unit (She has 6 more speed, 1 more defense, and 12 more resist. But 10 HP and 5 attack less). But she can also use weapon refinery to increase stats further (Hector cannot). Then she has the plus 2 to all stats when attacked weapon effect vs. the QR 2 built into Hector's. Does it seem worth it? (P.S - my other armor emblem teammates are W. Robin, H. Henry, and Black Knight).
IMO Lissa makes the best use of DC with +spd (or alternatively +res), as its her main niche compared to Hector who relies on his high atk and Armads. Tbh I'd stick with Hector as it is, but giving Lissa DC would not be a bad decision overall due to her great bulk, but keep in mind her lower attack will come back to bite her without the ability to double akin to Armads' effect.
She might not double on counters, but i'm thinking her greater bulk would allow her to survive more and then use bold fighter for double hits and special charges during player faze. (DC would just allow her to be somewhat useful in enemy phase and then her main damage would follow in player phase).
Pokemon GO
Fire Emblem Heroes
Fate Grand Order
Dragonball Legends
Dragalia Lost
IV Calc
Heroes