living lightning damage? help plz

Does anyone know how much damage living lightning does? it just says increased attack damage and speed from attributes but doesn't say anything about the initial damage? I placed it on herald of lightning does it scale off of that damage or is it scaling off of my weapon damage???

I was using it for awhile but I just could not get them to do any meaningful damage. It looks really cool at least, and if you put them on more than one skill you can actually summon a lot of them.

Maybe if you specd full minions they would do something but at that point you have a lot better options.

Maybe someone who knows more about the game interactions in depth could make it work.