2 Billion on the Archdemon?

Let's assume they time-glitched. That's 8.3 million dmg per second.

Any idea how?

I assume 8 zerk, 10/10, 5 blitz PD. Who else? SK? Succubus? PK? Let's assume enough SD crests to get perma-slow. Who are the top 5 to go w/PD for DPS?