Druid buffs and max damage > 20+T?

I am playing infinite cataclysm and can stack quickshift+6, Force of Will+40, with the full runes. And then I can trigger bulwark with soul harvest 50+. However, I found my max damage is around > 2000B (2T). I saw the video from YouTube when they do pit 150, they always can do >20T. I don’t know where my 10x damage gone and is there anyone can share how to do >20T damage? I am using the build from Maxroll with paragon level 270. Thanks.