Arcade Heat
I love the SumiaxFrederick pairing, especially in the early game (they cover eachothers weaknesses SO well), but I feel like it's better in the end to pair sumia up with either chrom or Henry, because both of them make much better Cynthias. With Chrom!Sumia, you end up getting one of they better lucinas as well
Also because magic is so overpowered in awakening, Henry!sumia is really good as a dark flier, solely using magic. I think I ended up having a higher magic stat than strength, but that could have just been luck on my part.