Interesting Summer Corrin Build

Today I pulled a +Res/-Atk (I know, I know) Summer Corrin. I've recently gotten some very strong fliers, but this one is the first and only mage flier for an emblem team, so I'm inclined to make her work. With resilience being a super boon, I feel like not all is lost with this IV, and an Owl Tome build should be fairly easy to utilize given the freedom of movement with fliers. I also think Bond skills would have wonderful synergy with Owl Tome, so I was thinking of something like this (see image):

B-slot I'm still a bit unsure on, as I'm not entirely certain whether I'll use Corrin as more of an Enemy Phase unit or Player Phase (where lance/swordbreaker may be quite effective).

Any insight would be most welcome. For reference, I plan to run her alongside NY Camilla, Hinoka, and NY Azura. I may also swap in OG Camilla from time to time. Thanks!