+Spd -Atk Summer Camilla

The easiest would be to build her with a blade tome and with access to flier buffs she won't struggle killing even with -atk.
You can give her fury or LnD for her A skill and give her +spd or +atk seal.

though she can still do well with her default weapon but with -atk she will perform not as good but with +spd the effect in her weapon will be more effective. The same skills as the bladetome build can be used with her default weapon.

She’ll actually still be workable; She’ll have 1 less atk than Summer Corrin but she’ll have 5 more speed.

Give SS!Camilla a Bladetome and Fury to patch her low atk

Have you searched to see if there's already an answer? We've had a lot of SS Camilla questions and I think I remember this IV showing up before. The search function on this site does go through questions people have asked.

any mage unit that has great spd can make use of bladetome. just make sure they constantly have maximum buffs on to patch up for the atk banes