2 questions

1. It's better than a -Spd, so she's buildable.
2. -Spd +Def.

1: if she’s your only one she’s your best one!
2: -spd +def. But if you don’t want to lose any more speed, -res+Hp is viable but won’t be as tanky (effectively losing -3def and -3res vs your +def Ike)