One single WitheredSummoner is able to spawn LOTS of monsters and even MORE WitheredSummoners. This can end a game with the lag alone.
Here's a video of a game where this happened. We had 5 but lost them due to a desync.
https://medal.tv/games/the-ultimate-doom/clips/jP5opp8g69-NuA_xp?invite=cr-MSxqRWosNDI5NzE3LA