Changes

((Max Onslaught Floor Reached Ever - Minimum Original Target Onslaught Floor) x 4.16 + (Max Ascension Level Reached ever / 50) ) x 3.

So if your highest Onslaught Floor reached was 100, with a minimum your Original Target Onslaught Floor of 48(this value will always be 30), and 500 Ascension Levels, the calculation looks like this:

((100 - 4830) * 4.16 + (500/50)) * 3 = (52 * 4.16 + 10) * 3 = 678903.966

So your Minimum Ascension with the above amounts would be set to 679904. This only increases if you've surpassed your previous highest Onslaught Floor.