Do you guys turn off the switching pokemon option? Just something to consider if you want more of a challenge
However, Swoobat is fast and has Attract, if it's up something slower that's a male things could be difficult.
Skarmory has Sturdy as well as Agility, so it can take a hit, then Speed up, then hit back. It also has a healing Berry, so if it's not damaged too much(Which could be possible with it's high Defense) it can heal a little, although I don't think that would be that useful against Electric types.
Sigilyph is fast and has Hypnosis.
Swanna has it's own thing but really isn't useful against Electric types considering the 4x effectiveness. Skyla's first three Pokemon are probably suppose to stop any Electric types, while Swanna can handle Rocks and Ice types(Skarmory can do so as well).