Popping 9,486,911,387,129 balloons with overpowered upgrades

I love bloons.
We've played it a lot on this channel, so let's look back at some of the best ideas we've tried.

Game: Bloons TD 6 - https://store.steampowered.com/app/960090/Bloons_TD_6/

Music provided by:
(Epidemic Sound) http://www.epidemicsound.com/