Need an alt to Flame Wall' in a Sorcerer/Stormweaver 'all electro' themed build

I'm looking at an all electricity themed Sorceress Stormweaver build, but almost every build I see online included the 'Flame Wall' skill.

I know for many peeps mixing and matching elemental damage types isn't a big deal but I'd like to keep it 100% electricity based abilities.

So what would you suggest as a replacement/swap out for the Flame Wall skill so many of these Sorceress builds rely on?

I know I can just not use it, but my gut tells me if I drop Flame Wall I'll need to fill the hole it leaves with another skill/spell no?