|With 33/36 offenses, Summer Camilla has the most well-tuned stat spread of the current blue tome fliers to wreak havoc via the combination of a blade tome + flier buffs.
As with all player-phase nukes, dancers (for this build, flying dancers) are a simple but effective way to up Summer Camilla's potential. Additionally, pairing this Camilla build with a straightforward way of dealing with high-res Greens is wise---notable partners being Elincia, Caeda, and NY Camilla, as they synergize well offensively while supplying more flier buffs.
Weapon: Blárblade+ is the centerpiece of the build, amping up Camilla's damage output significantly after receiving flier buffs.
Assist: Reposition is an all-around useful assist skill and suits Camilla better than most other options.
Special: Glimmer is the go-to special option for units with innately high damage output.
A Passive: Fury 3 is one part of the tried-and-true Fury/Desperation combo---boosting her base stats while also chipping her into range of Desperation.
B Passive: Desperation 3 is a crucial part to the builds of glass cannons like Summer Camilla, allowing her to successively strike twice before the opposing unit may counterattack once below the relevant threshold.
C Passive: Goad Fliers or Hone Fliers are likely the ideal choices for Camilla and depend on team composition (do note, however, that Hone Fliers will ideally be wanted on another unit to provide buffs for Camilla's blade tome).
Sacred Seal: Flier Formation 3 is the suggested seal for Summer Camilla, increasing the effective area she can threaten, but a variety of other seal choices work as well---Speed +3 seal being another worthwhile choice.