Firesweep Bow choice

Hi all, to cut a long story short I've an extra Firesweep Bow+ (I'm a F2P) and I've doubts on who to pick for it, so I'm asking for suggestions. I never ever used it so I'm not very familiar with it (I'm more a bait kind of guy).
PS: beside B!Lyn, I'm probably ending up using this unit for Assault Arena mostly, or I can consider for Aether Raid but I doubt it'll be useful in the long run. Maybe keep that in mind while giving my your suggestions.

Candidates:

B!Lyn (+3, +atk/-def)
Pro: I use her a lot / Also merged / I like Lyn
Con: Despite site's suggestions, I think Mulagir is better / My IVs is better for a Brave Build / She's already performing good enough without it, preventing counters from melee with B skill

L!Lyn (+res/-spd)
Pro: Green / I like Lyn
Con: Awful IVs / Swift Mulagir bonus is a way to patch up awful IVs / Firesweep build would require other investments that seem a waste on a terrible IVs character

Bride Cordelia (+res/-hp)
Pro: It's the unit I see more often with a firesweep build
Con: Bad IVs / Optimal build would require more investment, and I prefer to invest on characters with better IVs.

Summer Noire (+spd/-hp)
Pro: Probably the best IVs for a Firesweep / Just got her, so I can build her as I like
Con: I like coconuts

L!Hinoka (+spd/-atk) - I've another copy so I can eventually +1 her
Pro: +spd / By far the fastest bow user I've
Con: -atk / Warrior Princess is more versatile (can buff allies, effective against armor) and has a better sinergy with a flier team.

Other bow users I've but I don't think they make sense with firesweep (feel free to try to change my mind):
Innes (+def/-res)
New Year Corrin
Brave Roy (+res/-atk)

Thanks in advance, let me know if you are running a firesweep build even if it's not a character listed here. Also, feel free to contraddict my pro/con points if you think they're wrong.