-speed +defense elincia skill inheritance options?

Desperation isn't that wonderful on her anymore, due to that SPD bane, but she works fine since all she needs is a high attack rate.

Go for Deathblow 3, Flier Formation or Vantage, Threaten Def 3. Mainly a Player Phase's unit, but she'll kill most thing anyways, thanks to her Weapon and high attack stats.

That's my exact Elincia, lol. She's lolstomping Trials.
Other than that, I kind of just left it where it is and gave her Desperation, Moonbow and a Spd Seal (or Quickened Pulse, to really make that first one count). My ideal would be L&D, as it would allow her to reach 36-37 Spd (which still quads a handy amount).

The speed can be salvaged if you use summoner support on her.