How do you top guys get to trillions in damage?

Hi All.

As always, thank you to you all for your help. You've been great in the past with questions that I have asked.

I am wondering how you guys get to 1T+ in damage during a round.

I have the following:

8.47B damage base damage, gold boxed.

Damage lab = level 73, always running.

Damage workshop enhancement = level 55 (x1.55)

I run the beserker card, so x8 later in the round gets me to roughly 67B in damage.

If i accept the 1.65x tower damage/8x boss health, I can get to about 112B in damage.

But that it still a super far ways away from 1T+ like I see around here.

Am I missing something obvious, or do I just need a lot more work on my damage+ enhancement?

As always, thank you in advance.