I’ve gotten into the 100’s of billions with Ice based Prismatic, Frostbiting, and Brutal with Wizard using either Storm or Twister.
I’m going to try for an Arcane Element Blast Wizard using Deadly Strike with Orbit, Celestial, & Bleed, with Living Force. I’m going to do some 
& 
this weekend to write up 4 builds I have on my mind, and work on my new Dual Wizard Farm Team. I wonder if I can get into the Trillion Damage Club finally.
With my Arcanist Warrior,I can caught 7digits purple dmg on floor 5k…i only using single Elemen Ice but Arcanist and Ascendant do on All of types the elements…so Even i don’t using frostfire,greengarden etc u said . I still can capt Quintillion dmg in Dungeon
Soon,I’ll take the Screenshot for you and teach you how to make a simple build without icefire combo and posion/any DOT
I have a build that can deal 500B dmg
I am still waiting your teaching sensei xD
I can do lot of damage with arcanist / ascendant and other main element but not the damage you describe