First Flier Team

Myrrh is good flying dragon for green slot. Can act as wall with iote shield.
SYTiki also a nice PP red dragon
For blue cordelia is good with enough resource. Also come in abundance.

I'd suggest:
Myrrh - enemy phase, DC (if you can), QR2/3, Iote's shield
S!Y!Tiki - mixed phase, can keep her base kit with Vantage/Desperation/Renewal/Chill for her B slot.
Cordelia - hyper offense, easily merged at 4* or 5*, needs a Slaying or Firesweep Lance with Galeforce and Heavy Blade seal, Swift Sparrow or Life and Death for her A slot.
Aversa - capable mixed phase and can debuff with her tome. Running HP/Spd with HP/Res seal for maximum debuffing potential.

If you get a fast green or red flying tome I'd suggest they be built with a bladetome, Sum!Camilla can run it too but with Cordelia you'd then have two offensive blues. Spring Camilla can do it but she's slow so can be run with Vantage, SF!Nino is the better offensive Gronnblade and Aversa's Night is good.

Myrrh with Iote's Shield is a beast, give her Distant Counter and Quick Riposte and she'll be your main tank/bait.
F!Morgan can be built with a bladetome depending on her IVs, she can be scary if properly buffed.
You may even include Legendary Robin in your team and give them all an earth blessing so when it's the right season they'll gain some more HP and speed.

I think with fliers the main thing to consider is where to put buffs like Hone and Goad Fliers. You should probably think of every unit's role while choosing them. For example, I have two flier teams and both have: a main attacker, a bait/tank, two units who can buff/debuff and attack if needed.

What help do you need?. Just pick red, green, and blue units, and have Robin(F) as your colorless. I use Robin as a Magic tank with distant counter since she has adaptive damage.