Builds for a +Atk -Hp Sheena?

I have the exact same IV spread Sheena as yours, as my first 5 star. Mostly, to make her viable, just give her either Swap or Pivot, depending on which team she ends up on, as she could be a physical and magic tank easily while other units sweep up what's left. Personally, I use her as a tank on my Armor team, and also build her with Wary Fighter. If you do not have an Effie, try either Quick Riposte or Seal Atk. However, it you really want to build her to be offensive, she should inherit either Bonfire or Ignis, both could work, depending on what you have available. She can suprisingly take out some units with an Ignis. I don't have the best advice, but this is what I did.