Atamar of VV used 46 Guardian Dolls on his initial run at the alien mothership in demon gates. After his run, the invasion leaderboard says he hit it for -1,675,325,362. Hitting it further is forcing him to wear out his negative damage to get back to positive. Here is a screenshot after he had worked off some of his damage.

If it helps, Atamar is a Divine Sage, and used the valkyrie ally until it cast weaken three times, at which point he swapped to the huntress ally.
I'm sure it's not really correctable for this invasion, and that's cool. Just get the bug behind it fixed so it doesn't impact anyone else.
