A slot for karla

Depends on what you have available.

Just inherited darting blow 3 from a spare tharja and am training her now. It feels like the 2x exp bonus is still there.

You can give her Fury as it synergies with Wrath, or DB would be considered if you don't want fury.

I think death blow is better on her than fury. She's pretty frail and fury will eat at her life fast. You can get into wrath range with just one round of combat. She would prefer keeping herself alive by not letting her HP drain too fast, especially when she's not using desperation. With flashing blade seal, she can afford to use Aether and help sustain her while allowing her to dance around the safer 50-80% HP range instead of always being under threat of an enemy unit just needing to hit her once and die because of low HP.

What's the build? Shield pulse? AoE special? Galeforce? Desperation with damaging special?