+atk/-spd kagero

It wont affect her that much although she definitely cant double many units, luckily u have a +atk iv so I highly recommend death blow to have her attack sky rocket vs infantry units then u wont need to double.

I've got the same Kagero, gave her life and death 3, vantage and +1 atk seal, she's an infantry destroyer and won't get doubled so often thanks to LnD.
I also gave her moonbow, I don't know if it was the best choice to do but since I've got so many Odin I don't really care. Having moonbow activated sometimes saves the day.