Swift sparrow, who to give?

Literally ANY offensive unit. Use it on units that have good spd and Atk. Personally I wouldn't give it to my Lyn becuase she'd only reach 44 atk. I'd give it to a unit like Masked Marth, Lucina, Ryoma, Valter, Takumi, Celica, Nino, Linde, etc. Using Swift Sparrow to its maximum potential, use on units with >50 Atk and >35 spd. Those units can literally blow most other units out of the water with Swift Sparrow. Make sure they aren't native to Death Blow or Darting Blow because that'd just be a waste of sparrow.

My Innes benefited greatly from Swift Sparrow. An absolute monster he is.