I think it would be more beneficial for the coin if you do 100:1 swap instead of 20:1.
In that case, the Available Supply of EDU would be 2 billion. I prefer to have 1,000,000 EDU with a real value and not 5,000,000 with a low value.
Also, it would be easier to find DEV for a coin with 2 billion Available Supply (that is already high) than for a coin with 10 billion Available Supply (that's matter of business).