If you only ever get lucky enough to pull one 5* flying lancer (and I suspect our friend only pulled one), I'd say Hinoka's the best one you could possibly pull. Might be -3 Spd compared to Cordelia and thus not the best of the best at combat, but a) she'll still do fine and b) the real reason you bring Hinoka is Hone Fliers.
Three greens though...Yeah, if you attempt Flier Emblem in arena later, get one of them replaced if you can. lol
I say go for it. Bunilla w/ Gronnblade+ and buffs is the hardest-hitting green mage in the game and -HP/+Def isn't gonna change that. Only gets tied with Cecilia if Bunilla has a -Atk nature. You've also got Hone Fliers already and just need Fortify Fliers from the easier-to-obtain-than-Hinoka Caeda.
Of the 4*s: I actually do have Cordelia (+HP/-DEF), Palla (-ATK/+DEF), and Caeda (+SPD/-RES). The only reason I ran Bunilla, Camilla, Minerva, and Hinoka was because I had them at 40 -- and because the quests themselves didn't require no KOs, meaning I could auto-battle them at work.
Also have Beruka (+SPD/-ATK), Michalis, Camilla (-ATK/+DEF)... and no Cherche. Can't imagine sacrificing my 5* Nino for Gronnblade+ just yet (though I've got 3* Odins).
Ideal Flier Emblem will probably have to wait unless I just use Caeda.
At first, I found SI intimidating as a guy who spend an hour building characters at the beginning of open world RPGs because I couldn't decide.
I have made my share of mistakes and I eventually learned SI brought a new life into otherwise monotonous game. As I have finished all there is for single player contents, arena and SI are only reason why I still bother login and grind in the training tower.
Speaking of building teams, I really need a green mage which IS refuse to give me, yet.
That's how I feel -- IVs are annoying, and SI requires a ton of SP. Granted, I get it; it should.
As far as units, I guess I'm working on:
Nino
Effie
Azura
Eirika
Nino has Swift Sparrow 2, Desperation 3, and Hone Atk 3. I should give her Ardent Sacrifice. Effie's (+HP/-DEF) working towards Brave Lance and I gave her Pivot. (Again, I
seriously hate IVs.) Eirika (-HP/+DEF), well: she needs Rally Defense, Triangle Adept, and Swordbreaker, I guess.