Universe Expander help needed

So in Universe Expander rewritten, one of Jacorb’s games, during the Batteries section of the game, how do you get enough AE to get the e20,000 upgrade?

I know that this was so long ago that it’s probably already been done but to try to grind dimensional depths so that you can get a bunch of annihilation energy

And try to spend a lot of universe essence on the decrease size for dimensional depths