Autobomber help

Trying to make an auto bomber with the triple elemental damage unique and need help

There is already a type of this but theres no guide for it that i can find

Someone called it 0 button autobomber another called it fakeblood

You can see them if you search poe builds there seems to be a witch and a scion version

What is it that you need help with? Can't sustain something? Loop ends? Your characters are hidden.