Sorcery Blade Eir

Would Eir make good use of Sorcery Blade? Her weapon has Swift Sparrow built in, that works on both phases. Her B skill negates any dragon or Wrathful Staff unit from wrecking her day. Her attack and speed are pretty good for a flying dagger unit. Would Eir make good use of Sorcery Blade? I'm really tempted to give her Sorcery Blade.