Guide on Camilla emblem buffs?

Axe Camilla should get Goad, especially if you're running her with her Goad-refined Camilla's Axe.

Spring Camilla can get Fortify Fliers to better help NY!Camilla with her bulk.

NY!Camilla would then have Hone Fliers because... it's Hone Fliers.

Summer Camilla can a Ward/Goad Fliers, I guess. Doesn't really matter too much with her since she's getting a Blarblade anyway, so she'll nuke everything in sight.

Although you can switch it around, that's probably how I'd do it.

Priority for receiving fortify fliers: regular Camilla and summer Camilla followed by spring Camilla. So definitely belongs on NY Camilla
Priority for receiving hone fliers: NY Camilla and summer Camilla. I'd put it on spring Camilla because goad is the most consistent way to play original Camilla.

Recap:
NY Camilla: fortify
Spring Camilla: hone
OG Camilla: goad
Summer Camilla: flexible. Hone is good in this case so that everybody receives a hone, plus she comes with it.

Formation:
NY Camilla and Spring Camilla position adjacent to Summer Camilla, preferably in an L-shape so that both of the first two can also buff original Camilla. If the square cannot be achieved, you'll need to decide whether original Camilla or Summer Camilla needs the fortify more that turn, or whether someone might be ok without a hone for this turn.

Cant believe I'm saying this but.....

You got to love a Thot Emblem,

Your lucky to get all the Camillas' Ive only got the normal variant, probably try to summon for SS!Camilla. I think that you should go with Slaying Edge on NY!Camilla as she can't utilitise Wrath because of her movement restrictions and it works better if you're running offensive builds like Fury with HeavyBlade SS. Have you considered giving her Firesweep Sword with LnD. I think it would work better for an offensive build.