Eirika +Res -Spd or +HP -Atk?

May as well go with the +HP. Her atk's pretty suckish anyway.

Do you have a 4 star version of her with better ivs? what i did was 5 star my +spd -hp 4* and then merge my other 2 5* with her she turned out pretty decent so i say just wait till you get a 4 star with better ivs