Kana (F) Help

Even with a defense bane, F!Kana can still tank quite a bit, especially with her Water Breath+ with the defense refinement. For the skills, you could give her the normal dragon-tank build, but I don't know if you're willing to give her something like Steady Breath when she doesn't have the most optimal IVs. Brazen Def/Res could help her tank, as well. You could give her Atk/Def Bond from Fjorm if you have any of her lying around.

Of course, you could also make her into a Player Phase dragon unit as well. She has, in my opinion, more than enough speed (unless you're trying to do T20 or something) to pull off a Desperation B. Although with that, you might want to make her mixed phase, being able to tank hits to get into Desperation range rather than just going full offense with something like Life and Death.