I’m a little disappointed that there is no lightning-themed high damage, high cost skill, unlike for Fire and Ice (Meteor/Ice Barrage respectively). Static Orb just doesn’t cut it. I even looked through all the skills to see if I could change the flavour to lightning, but I can’t.
Blackhole would be great for this in my opinion. Just add or change one of the nodes so that it deals Lightning damage instead of Cold (there’s already a node that changes it to Fire damage so why not lightning?). Or, you know, a brand-new skill But I doubt you’d want to spend the time and resources just for that.