@kidphillip: I mean, if you are going to lowball, at least be correct about what happened. Barry hit her with speed force lightning prior to Leslie hitting Kara. She even thanked Barry for 'top off'. And then she one shotted him with a tiny lighting blast. Someone who also has lightning resistance feats.
Ok? That does nothing to suggest her normal lightning attacks were stronger. Liverwire's attacks always hurt supergirl in the same way, and if you were to argue Flash's speedforce lightning did "amp" livewire, it did a really poor job of amping her up then since it doesn't noticeably give her more power or make her stronger than she already is.
Show me proof Barry did anything to suggest Livewire was hitting harder because of him. I interpreted that as a "lightning doesn't really hurt me for that to work".
In the recent episode of supergirl, she gets hurt by an electric baton. So even if you try to wank Kara to say she can tank lightning, she's hurt by electric batons.
remember when she was brainwashed and tried to kill Barry? She was slower, but she runs and rewinds time at the same time, which allowed her to catch up to barry and nearly kill him if it wasn't for team flash.