Help building a -Def +Hp Legendary Ryoma

I got a -Def Ryoma as well, and look on the bright side! Now you can throw on that Desperation with no regrets! You can give him Swift Sparrow preferrably, or just Death Blow 3 with a +Spd seal. Reposition and flier buffs are a given (Guidance is fine in the meantime). His Special, especially with dat -Def nature, is of course going to be Moonbow, or Glimmer if you give him the Swift Sparrow. If you give him the Swift Sparrow, you can give Ryoma a +Atk seal, otherwise give him a +Spd seal, or if you have given him Swift Sparrow and feel a bit maniacal, give him Heavy Blade so he has the chance to proc Moonbow instantly with Desperation.The game plan with Ryoma is letting him tank one hit, be that a weaker red, a green or a non-archer colorless unit, ranged or physical, and then go to town with the Desperation plus his buffs to his Atk and Spd, and even Heavy Blade to allow him to use Moonbow guaranteed every turn of combat- your Ryoma is still completely salvageable (-Atk or -Spd on the other hand...)