Here's this: http://anydice.com/program/8de (http://anydice.com/program/8de)<br/><br/>On 1 die, yeah, you're only going to get a 40% chance at 1 success, but then, that's half the price of the 2nd excellency.<br/><br/>On 2 dice, 63% or so of getting at least 1 success, which includes the 7% chance of getting 3 or 4 successes.  The second excellency eliminates the 37% chance of not getting any successes as well as the 28% chance of scoring 2-4 successes.