Sacrificing Nephenee y/n

I got Nephenee as my free summom, but unfortunately she's -Atk +Def. I'm thinking about giving Wrath to Joshua because he's one of my fav units. Is there any reason to keep Nephenee? I already have Sharena, +Spd Lancina and +Def Charlotte as my infantry lance units, and Fjorm is going to be free in a few days, so Nephenee isn't needed.