Titansoul Inventory Helper which simulates the amount of Soul'er Power linked monsters would give - Since there are no benefits to going above the max of 2800 Soul'er power, it's best to try link monsters that produces as low of a total of Soul'er Power as possible while still being above the 2,800 threshold.
There may be errors in the coin rates by 1 or 2 due to rounding errors
Currently updated to the most recent update (Faesoddoid Fungus)